15 Best PC Power Supplies Under $150, Compared
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
Selecting the best PC power supplies under $150 requires matching electrical capacity directly to your build's hardware requirements. This comparison evaluates 15 models based strictly on the specifications published on the listings.
The Corsair SF 1000W Fully Modular PSU takes the top position by delivering 1000 watts of fully modular capacity for high-draw setups. Across the list, you will find details on standard ATX, Mini ITX, and Flex ATX form factors, along with efficiency ratings and modularity. This guide helps you decide which wattage, physical footprint, and cable layout fit your specific PC case and components.
Quick picks
The best fit for you
- You need high wattage and fully modular cabling Corsair SF 1000W Fully Modular PSU This unit supplies 1000 watts of output with fully modular cable routing.
- You need ATX 3.1 and PCIe 5.1 support MSI MPG 850W Gold ATX 3.1 Power Supply It features the ATX 3.1 standard alongside a dedicated 12V-2x6 PCIe 5.1 connector.
- You want high wattage in an SFX form factor Lian Li 750W SFX Gold Power Supply Its dedicated SFX form factor delivers 750 watts of Gold-rated power.
- You want a modest semi-modular power supply EVGA 500 BQ 500W Semi-Modular Power Supply It provides a 500-watt output with an 80 Plus Bronze semi-modular design.
Our 15 picks
Corsair SF 1000W Fully Modular PSU
Best for: high-draw systems needing fully modular cabling
- Wattage
- 1000 Watts
- Efficiency Rating
- 80 Plus
- Modularity
- Fully Modular
- Size
- 1000W
- Dimensions
- 7.6 × 9.4 × 11.3 inches
- Weight
- 2.31 pounds
This renewed Corsair unit delivers 1000 watts of output for high-demand hardware configurations. You get fully modular cabling, which lets you attach only the leads required for your build to keep your chassis clear. It features an 80 Plus efficiency certification and low-noise operation in a black enclosure. Choose this power supply if you run power-heavy components and need clean cable routing.
Pros
- 1000-watt power output
- Fully modular cable design
- 80 Plus efficiency rating
- Low-noise operation profile
Cons
- Renewed condition rather than brand new
- Base 80 Plus rating instead of Gold or Platinum tier
Good fit if
- You need 1000 watts of capacity for high-draw hardware.
- You want fully modular cables to simplify case routing.
Skip if
- You prefer factory-sealed hardware over a renewed unit.
- You require Gold or higher efficiency certification.
Verdict: Corsair 1000W Fully Modular Power Supply delivers 1000 watts of fully modular capacity in a low-noise renewed package. It suits builders needing substantial power without fixed cable clutter.
EVGA SuperNOVA 750W Bronze Power Supply
Best for: mid-range desktop gaming systems needing 750W
- Wattage
- 750W
- Efficiency Rating
- 80PLUS Bronze
- Modularity
- Hybrid Modular
- Dimensions
- 7.1 × 5.9 × 3.4 inches
- Weight
- 7 pounds
The EVGA SuperNOVA 750W Hybrid Modular PSU delivers 750 watts of power with 80 PLUS Bronze efficiency, reaching up to 85% efficiency under typical loads. It features a multi-rail setup, Japanese brand capacitors, and a quiet 2-ball bearing cooling fan. The hybrid modular cable layout reduces case clutter by letting you detach unused cables. This unit suits you if you need dependable 750-watt output for a mid-tower PC build.
Pros
- 750W continuous output with 80 PLUS Bronze efficiency
- Japanese brand capacitors for component durability
- Hybrid modular cabling reduces interior clutter
- Comprehensive protection suite including OVP, UVP, OCP, OPP, SCP, and OTP
Cons
- 80 PLUS Bronze efficiency is lower than Gold-rated alternatives
- Hybrid modular design leaves essential cables permanently attached
- 7.1-inch casing length requires extra depth inside your chassis
Good fit if
- You need 750 watts of power for your components.
- You prefer hybrid modular cabling to simplify internal wire management.
- You want a multi-rail design equipped with Japanese brand capacitors.
Skip if
- You require a fully modular unit where all cables detach.
- You prefer higher electrical efficiency such as 80 PLUS Gold.
- You have a compact chassis that cannot fit a 7.1-inch power supply.
Verdict: EVGA SuperNOVA 750W Hybrid Modular PSU provides dependable 750-watt power delivery with Japanese capacitors and multi-rail protection. Its hybrid cable layout and 80 PLUS Bronze efficiency make it a practical fit for mid-tower setups.
FSP 300W Flex ATX Power Supply
Best for: compact low-power Mini ITX desktop builds
- Wattage
- 300W
- Efficiency Rating
- 80Plus Gold
- Fan Size
- 40mm
- Form Factor
- Mini ITX
- Dimensions
- 5.9 × 3.2 × 1.6 inches
- Weight
- 1.8 pounds
The FSP 300W Flex ATX 80 Plus Gold Power Supply is a compact power supply for small form factor computers. You get 300W of power, 80 Plus Gold efficiency, and a 40mm ball-bearing fan in a frame measuring 5.9 by 3.2 by 1.6 inches. It supports Intel and AMD systems, making it a practical choice for you when building a compact Mini ITX setup.
Pros
- 80 Plus Gold efficiency rating
- Compact dimensions of 5.9 by 3.2 by 1.6 inches
- Built-in 40mm ball-bearing cooling fan
- Over-voltage and line input fuse protections
Cons
- Limited to 300W maximum capacity
- Small 40mm fan size
Good fit if
- You need a compact Flex ATX or Mini ITX power supply.
- You run an Intel or AMD system that requires 300W or less.
- You want 80 Plus Gold efficiency in a small frame.
Skip if
- You require more than 300W of total output.
- You need a full-size ATX power supply.
Verdict: FSP 300W Flex ATX 80 Plus Gold Power Supply delivers efficient power in a miniature chassis built for tight Mini ITX enclosures. Its 300W capacity and 40mm fan make it suitable strictly for low-draw small-form-factor systems.
EVGA 500 BQ 500W Semi-Modular Power Supply
Best for: budget builds needing semi-modular cable management
- Wattage
- 500W
- Efficiency Rating
- 80+ Bronze
- Modularity
- Semi Modular
- Fan Size
- 120 millimeter
- Warranty
- 3 Year
- Dimensions
- 5.51 × 5.91 × 3.35 inches
The EVGA 500 BQ is a 500W semi-modular power supply built for modest PC builds. It carries an 80 Plus Bronze rating for up to 85 percent efficiency under typical loads. The unit features a 120 millimeter fluid dynamic bearing fan and built-in protections like OVP and SCP. It suits you if you need clean cable management in an entry-level rig without paying for fully modular cables.
Pros
- Semi-modular design for cleaner cable management
- 80 Plus Bronze efficiency rating up to 85 percent
- 120 millimeter fluid dynamic bearing fan
- Comprehensive protections including OVP, UVP, OCP, OPP, and SCP
Cons
- 500W capacity limits use with high-power graphics cards
- Efficiency is limited to 80 Plus Bronze rather than Gold
- Three-year warranty is shorter than higher-tier units
Good fit if
- You need a 500W semi-modular supply to reduce case clutter.
- You run a low-to-mid-range system that stays within 500W.
- You want standard hardware protections like OVP, UVP, and SCP.
Skip if
- You require 80 Plus Gold efficiency or higher.
- You need more than 500W of power for demanding hardware.
- You want fully modular cables.
Verdict: EVGA 500 BQ 500W Semi-Modular PSU delivers entry-level Bronze power with flexible semi-modular cabling. It is a sensible pick for basic builds that do not require high wattage.
Thermaltake Toughpower Grand RGB 850W PSU
Best for: high-wattage ATX setups wanting integrated RGB lighting
- Wattage
- 850W
- Form Factor
- ATX
- Dimensions
- 6.3 × 5.91 × 3.39 inches
- Weight
- 8.11 pounds
The Thermaltake Toughpower Grand RGB 850W ATX PSU delivers 850 watts of output power in a standard ATX chassis. It measures 6.3 inches long, 5.91 inches wide, and 3.39 inches tall. For cooling and illumination, it includes a Riing 14 RGB fan offering five lighting modes with internal memory, paired with a Smart Zero Fan mode to reduce noise during low or medium loads. This unit suits you if you need high wattage and customizable internal lighting.
Pros
- 850W total output capacity
- Riing 14 RGB fan with 256 colors, five lighting modes, and built-in memory
- Smart Zero Fan operation to reduce fan noise at low to medium loads
- Digital control on the primary side with PFC and LLC controller
Cons
- No 80 Plus efficiency level specified in the data
- Heavy build at 8.11 pounds
- ATX form factor does not fit small-form-factor or SFX cases
Good fit if
- You need 850W of power for high-draw hardware.
- You want built-in RGB lighting modes and profile memory directly on the cooling fan.
- You prefer a fan profile that stays quiet during lower loads.
Skip if
- You are assembling a compact system requiring an SFX power supply.
- You require a documented 80 Plus efficiency certification on the spec sheet.
Verdict: Thermaltake Toughpower Grand RGB 850W ATX PSU provides 850W of power alongside customizable fan illumination and zero-RPM operation at lower loads. It is a solid choice if you need high wattage and integrated RGB within a standard ATX enclosure.
Thermaltake Toughpower GX1 RGB 600W PSU
Best for: fixed-cable systems requiring 80 Plus Gold efficiency
- Wattage
- 600W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Non Modular
- ATX Version
- ATX12V v2.4
- PCIe Connector Type
- 6+2 pin
- Fan Size
- 120mm
The Thermaltake Toughpower GX1 RGB 600W is a non-modular ATX power supply built for mid-range desktops. You get 80 Plus Gold efficiency up to 90 percent, a 120mm hydraulic bearing fan with 10 RGB LEDs, and Japanese main capacitors rated for 105°C. With two 6+2-pin PCIe connectors and eight SATA ports, it suits you if you run a single dedicated graphics card and prefer fixed cabling inside a standard case.
Pros
- 80 Plus Gold certified efficiency up to 90%
- Main Japanese capacitors rated to 105°C
- 120mm hydraulic bearing fan with 16 RGB lighting modes
- Five-year manufacturer warranty
- Industrial OPP, OVP, and SCP protections
Cons
- Non-modular design leaves unused cables permanently attached
- Only includes two 6+2-pin PCIe connectors
- No PCIe 5.0 or 12VHPWR connector support
Good fit if
- You want 80 Plus Gold electrical efficiency with fixed wiring.
- You want built-in RGB lighting controlled directly via a physical button.
- You use a graphics card requiring no more than two 6+2-pin power cables.
Skip if
- You require modular cables to minimize internal chassis clutter.
- You need more than 600W of continuous power for high-draw hardware.
- You need direct 12VHPWR power delivery for newer generation graphics cards.
Verdict: Thermaltake Toughpower GX1 RGB 600W delivers 80 Plus Gold efficiency, 105°C Japanese main capacitors, and integrated RGB lighting in a fixed-cable format. It suits standard desktop configurations requiring up to two PCIe 6+2-pin connections.
Thermaltake Toughpower iRGB Plus 750W Gold PSU
Best for: builders wanting digital monitoring and RGB lighting
- Wattage
- 750W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- ATX Version
- ATX12V V2.4
- Fan Size
- 140mm
- Warranty
- 10 Year
View on Amazon: Thermaltake Toughpower iRGB Plus 750W Gold PSU
The Thermaltake Toughpower iRGB Plus 750W is a fully modular ATX power supply featuring 80 Plus Gold efficiency and a 140mm addressable RGB fan. It gives you detailed digital monitoring through Smart Power Management software, letting you track real-time hardware status and alerts. With a 10-year warranty and a zero-RPM fan mode up to 30% load, it suits you if you want premium software control and lighting customization in a standard ATX build.
Pros
- Fully modular design for clean cable routing
- 80 Plus Gold certified efficiency
- 10-year warranty coverage
- Smart Power Management app for real-time component tracking
- 140mm RGB fan with Smart Zero mode below 30% load
Cons
- Built to ATX12V V2.4 specs without native PCIe 5.0 connectors
- Housing length of 6.3 inches requires extra clearance over compact units
Good fit if
- You want real-time software monitoring for power draw and component status.
- You want addressable RGB lighting compatible with Razer Chroma or Alexa.
- You need a fully modular 750W supply backed by a 10-year warranty.
Skip if
- You need native ATX 3.0 or PCIe 5.0 power connectors for newer graphics cards.
- You are building inside a compact chassis that cannot fit a 6.3-inch power supply.
Verdict: Thermaltake Toughpower iRGB Plus 750W combines 80 Plus Gold power delivery with advanced digital tracking and customizable RGB lighting. It is a solid fully modular option for builders seeking deep software control and long warranty coverage.
EVGA SuperNOVA GA 650W Power Supply
Best for: standard mid-range PC builds wanting modular cables
- Wattage
- 650W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- Warranty
- 10 Year
- Dimensions
- 11.8 × 9 × 4.8 inches
- Weight
- 4.4 pounds
This power supply provides 650W of continuous output with 80 Plus Gold certification, delivering at least 90 percent efficiency under typical loads. It features a fully modular cable design to minimize internal case clutter. Inside, it uses 100 percent Japanese capacitors, an LLC resonant circuit, and DC-DC conversion. With its double ball bearing fan and EVGA ECO mode, it suits your mid-range build requiring stable power delivery and long-term 10-year warranty coverage.
Pros
- 80 Plus Gold certified for 90% or higher efficiency under typical loads
- Fully modular cable layout
- 100% Japanese capacitors with LLC resonant and DC-DC topology
- Double ball bearing fan with EVGA ECO mode
- 10-year warranty
Cons
- 650W ceiling restricts high-draw flagship graphics cards
- No ATX 3.0 or PCIe 5.0 standards listed in specifications
Good fit if
- You need 650W capacity with fully modular cable routing.
- You want 80 Plus Gold efficiency paired with a 10-year warranty.
Skip if
- You need 750W or higher power output for power-heavy hardware.
- You require explicit ATX 3.0 or PCIe 5.0 compatibility.
Verdict: EVGA SuperNOVA 650W Gold Modular PSU delivers 650W of Gold-rated power with full modularity and Japanese capacitors. It gives you dependable efficiency and clean cable management backed by a 10-year warranty.
Lenovo ThinkCentre 210W TFX Power Supply
Best for: Lenovo ThinkCentre TFX desktop replacements
- Wattage
- 210W
- Form Factor
- TFX
- Dimensions
- 1.1 × 9.7 × 6.5 inches
This Lenovo unit provides a dedicated 210W replacement power supply built in the compact TFX form factor. It supports wide 100-240Vac input voltages and carries ES7 compliance. If you maintain or repair a compatible Lenovo ThinkCentre desktop, this power supply gives you the exact physical dimensions and low wattage rating needed for factory-spec operation. Its narrow 1.1-inch profile suits slim, small-form-factor office enclosures where standard ATX power supplies cannot fit.
Pros
- TFX form factor for compact slim enclosures
- Wide 100-240Vac input voltage range
- Built to ES7 compliance specifications
- Slim 1.1-inch profile
Cons
- Low 210W maximum power capacity
- Designed specifically for compatible ThinkCentre chassis
Good fit if
- You need a direct replacement unit for a compatible Lenovo ThinkCentre desktop.
- You run a low-draw office computer that requires a dedicated TFX power supply.
Skip if
- You need more than 210W for high-draw components or discrete graphics cards.
- You have a standard ATX PC chassis.
Verdict: Lenovo ThinkCentre 210W TFX Power Supply delivers targeted 210W power for maintenance and repairs of compatible small-form-factor systems. Its narrow footprint matches factory requirements for compact desktop enclosures.
be quiet! SFX L 600W Gold Modular Power Supply
Best for: compact Mini ITX and SFX-L gaming builds
- Wattage
- 600W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Modular
- Fan Size
- 120mm
- Warranty
- 3-Year
- Form Factor
- Mini ITX
View on Amazon: be quiet! SFX L 600W Gold Modular Power Supply
The be quiet! SFX L 600W Modular Power Supply delivers 600W of continuous power in a compact SFX-L form factor designed for Mini ITX chassis. You get an 80 PLUS Gold efficiency rating that reaches up to 92 percent efficiency, alongside fully modular cabling and a temperature-controlled 120mm fan. It suits your compact gaming rig or standard desktop build using the bundled SFX-to-ATX bracket.
Pros
- 80 PLUS Gold certification with up to 92% efficiency
- Fully modular cable configuration
- Four PCIe connectors for multi-GPU support
- Temperature-controlled 120mm cooling fan
- Includes SFX-to-ATX adapter bracket
Cons
- Limited to 600W maximum output
- Three-year manufacturer warranty
Good fit if
- You need a modular 600W power supply for a Mini ITX enclosure.
- You want four PCIe connectors in an SFX-L build.
- You plan to mount an SFX-L unit into an ATX case using an adapter bracket.
Skip if
- You require more than 600W of power for high-draw hardware.
- You want a manufacturer warranty longer than three years.
Verdict: be quiet! SFX L 600W Modular Power Supply provides compact 80 PLUS Gold power with modular cables and a 120mm fan for small-form-factor builds. It gives you four PCIe connectors and an ATX adapter bracket to balance flexible cable management with steady 600W output.
SilverStone 500W Flex ATX Power Supply
Best for: Ultra-compact Mini-ITX and 1U chassis builds
- Wattage
- 500W
- Efficiency Rating
- 80 PLUS Gold
- Form Factor
- Flex ATX
- Dimensions
- 5.91 × 3.21 × 1.59 inches
- Weight
- 2.87 pounds
The SilverStone 500W Flex ATX Gold Power Supply provides continuous 500W power in a compact 1.59-inch tall Flex ATX form factor. It carries an 80 PLUS Gold efficiency certification and uses a Japanese primary capacitor for reliable power delivery. Designed for 24/7 operation at a 40°C operating temperature, it suits you if you are building an ultra-small form factor desktop or a compact chassis that requires dedicated Flex ATX dimensions.
Pros
- Standard Flex ATX dimensions measuring 1.59 inches tall
- 80 PLUS Gold certified efficiency
- Continuous 500W output at 40℃ rated for 24/7 operation
- Japanese primary capacitor and single +12V rail
Cons
- Limited to 500W maximum continuous output
- Flex ATX mounting dimensions do not natively fit standard ATX brackets
Good fit if
- You need a dedicated Flex ATX unit for an ultra-compact chassis
- You require 80 PLUS Gold efficiency in a small footprint
- You run continuous 24/7 workloads up to 40℃ operating temperatures
Skip if
- You need more than 500W of total power for higher-draw components
- You use a standard chassis designed for full-size ATX or SFX power supplies
Verdict: SilverStone 500W Flex ATX Gold Power Supply delivers stable 80 PLUS Gold efficiency and continuous 500W output for ultra-compact systems. Its standard Flex ATX dimensions make it a solid choice for specialized mini-ITX and 1U enclosures.
GAMEMAX 1050W ARGB Fully Modular PSU
Best for: high-wattage ATX 3.0 gaming builds
- Wattage
- 1050W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.0
- PCIe Connector Type
- 12VHPWR 16pin
- Fan Size
- 140mm
This ATX power supply delivers 1050W of continuous power with an 80 Plus Gold efficiency rating. It features full ATX 3.0 compatibility, including a dedicated 16-pin 12VHPWR connector capable of feeding up to 600W to demanding graphics cards. With fully modular cabling, ARGB lighting controls, and a 140mm hydraulic bearing cooling fan, it suits you if you are assembling a high-draw gaming system that requires modern power delivery.
Pros
- 1050W total output with 80 Plus Gold efficiency
- ATX 3.0 and PCIe 5.0 ready with a 600W 12VHPWR connector
- Fully modular cable design
- 140mm hydraulic bearing cooling fan
- Motherboard-syncable ARGB lighting with 25 modes
Cons
- Length of 6.61 inches requires more clearance than compact ATX units
- ARGB illumination features add unnecessary wiring if you prefer an unlit build
Good fit if
- You need a dedicated 12VHPWR cable providing up to 600W for a modern GPU.
- You run a high-wattage gaming PC that benefits from 1050W of power.
- You want fully modular cables to simplify internal routing.
Skip if
- You have a compact PC case that cannot accommodate a 6.61-inch deep PSU.
- You prefer a non-illuminated power supply without RGB lighting controls.
Verdict: GAMEMAX ARGB Pro 1050W ATX 3.0 Power Supply provides high-wattage ATX 3.0 power delivery and dedicated PCIe 5.0 graphics connectivity for demanding hardware configurations. Its fully modular cabling and 80 Plus Gold efficiency make it a capable centerpiece for modern gaming builds.
Lian Li 750W SFX Gold Power Supply
Best for: Compact small-form-factor Mini-ITX PC builds
- Wattage
- 750W
- Efficiency Rating
- 80 PLUS GOLD
- Modularity
- Fully modular
- Form Factor
- SFX
- Dimensions
- 9.5 × 4.13 × 7 inches
- Weight
- 2.2 pounds
The Lian Li 750W Gold SFX Power Supply is a compact power unit built for small-form-factor systems. You get 750 watts of output with 80 PLUS Gold efficiency in a standard SFX profile. It includes fully modular braided cables to save space, Japanese electrolytic capacitors for durability, and a zero-RPM fan mode below 40 percent load. This unit suits you if you build high-power Mini-ITX desktop systems with limited interior room.
Pros
- Compact SFX form factor
- 80 PLUS Gold efficiency certification
- Fully modular braided cables
- Zero-RPM mode engages under 40% load
- Japanese electrolytic capacitors
Cons
- Cooling fan spins once power load exceeds 40%
- Caps total power delivery at 750W
Good fit if
- You build a small-form-factor PC that requires an SFX power supply.
- You want fully modular braided cables to assist cable management.
- You need silent operation during light system loads under 40%.
Skip if
- You require more than 750W of total power output.
- You build inside a case that requires an ATX form factor unit.
Verdict: Lian Li 750W Gold SFX Power Supply delivers high-density 80 PLUS Gold power with fully modular braided cabling for small enclosures. It provides quiet low-load operation and dependable hardware components for space-constrained desktop builds.
EVGA SuperNOVA 850 G7 Gold Modular PSU
Best for: compact high-power modular ATX gaming systems
- Wattage
- 850W
- Efficiency Rating
- 80 Plus Gold
- Modularity
- Fully Modular
- Warranty
- 10 Year
- Dimensions
- 5.1 × 5.9 × 3.4 inches
- Weight
- 1.87 pounds
The EVGA SuperNOVA 850 G7 is an 850-watt power supply built for mid- to high-tier desktop systems. It provides 80 Plus Gold efficiency, fully modular cabling, and an internal DC-to-DC topology using Japanese capacitors. Measuring 5.1 inches long, it fits easily into tight chassis compartments. You get an ECO mode switch for quiet operation alongside a 10-year warranty, making it a reliable pick if you need dependable, high-output power.
Pros
- 80 Plus Gold certified efficiency up to 92%
- Fully modular cabling to reduce internal clutter
- 100% Japanese capacitors with half-bridge LLC resonant design
- Fluid dynamic bearing fan with EVGA ECO mode
- 10-year limited manufacturer warranty
Cons
- No PCIe 5.0 or 12VHPWR cables listed in specifications
- Lacks Platinum or Titanium level efficiency ratings
Good fit if
- You need 850 watts of fully modular power for clean cable management.
- You prefer quiet cooling with an ECO mode and fluid dynamic bearing fan.
- You want long-term coverage backed by a 10-year warranty.
Skip if
- You require native PCIe 5.0 12VHPWR power connectors.
- You need more than 850W of continuous output for heavy multi-GPU workloads.
Verdict: EVGA SuperNOVA 850 G7 850W Gold PSU delivers reliable 850-watt power delivery with high efficiency and compact length. Its 10-year warranty and Japanese capacitors make it a dependable choice for modern desktop builds.
MSI MPG 850W Gold ATX 3.1 Power Supply
Best for: modern gaming builds needing ATX 3.1
- Wattage
- 850W
- Efficiency Rating
- 80+ Gold
- Modularity
- Fully Modular
- ATX Version
- ATX 3.1
- PCIe Connector Type
- 12V-2x6
- Warranty
- 10 Year
This MSI 850W unit is an ATX form factor power supply built for gaming systems. It features the ATX 3.1 specification, PCIe 5.1 support, and includes a native 12V-2x6 connector. With an 80 Plus Gold efficiency rating, fully modular cables, and Japanese 105°C capacitors, it delivers power to current components. It suits you if you build a desktop needing modern GPU power standards.
Pros
- ATX 3.1 and PCIe 5.1 ready
- Native 12V-2x6 power connector
- Fully modular cable design
- 80 Plus Gold efficiency rating
- 10-year limited warranty
Cons
- Standard ATX dimensions do not fit SFX cases
- 850W capacity limits ultra-high-draw configurations
Good fit if
- You need a native 12V-2x6 connector for modern graphics cards.
- You want ATX 3.1 compliance and a 10-year warranty.
- You prefer fully modular cables to simplify case airflow.
Skip if
- You build inside a compact SFX or Mini-ITX case.
- You require 1000W or higher capacity for extreme hardware.
Verdict: MSI 850W ATX 3.1 Power Supply delivers modern GPU connectivity, fully modular cabling, and Japanese capacitors backed by a 10-year warranty.
Specifications side by side
| Spec | Corsair SF 1000W Fully Modular PSU | EVGA SuperNOVA 750W Bronze Power Supply | FSP 300W Flex ATX Power Supply | EVGA 500 BQ 500W Semi-Modular Power Supply | Thermaltake Toughpower Grand RGB 850W PSU | Thermaltake Toughpower GX1 RGB 600W PSU | Thermaltake Toughpower iRGB Plus 750W Gold PSU | EVGA SuperNOVA GA 650W Power Supply | Lenovo ThinkCentre 210W TFX Power Supply | be quiet! SFX L 600W Gold Modular Power Supply | SilverStone 500W Flex ATX Power Supply | GAMEMAX 1050W ARGB Fully Modular PSU | Lian Li 750W SFX Gold Power Supply | EVGA SuperNOVA 850 G7 Gold Modular PSU | MSI MPG 850W Gold ATX 3.1 Power Supply |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wattage | 1000 Watts | 750W | 300W | 500W | 850W | 600W | 750W | 650W | 210W | 600W | 500W | 1050W | 750W | 850W | 850W |
| Efficiency Rating | 80 Plus | 80PLUS Bronze | 80Plus Gold | 80+ Bronze | not specified | 80 Plus Gold | 80+ Gold | 80 Plus Gold | not specified | 80 PLUS Gold | 80 PLUS Gold | 80 Plus Gold | 80 PLUS GOLD | 80 Plus Gold | 80+ Gold |
| Modularity | Fully Modular | Hybrid Modular | not specified | Semi Modular | not specified | Non Modular | Fully Modular | Fully Modular | not specified | Modular | not specified | Fully Modular | Fully modular | Fully Modular | Fully Modular |
| ATX Version | not specified | not specified | not specified | not specified | not specified | ATX12V v2.4 | ATX12V V2.4 | not specified | not specified | not specified | not specified | ATX 3.0 | not specified | not specified | ATX 3.1 |
| PCIe Connector Type | not specified | not specified | not specified | not specified | not specified | 6+2 pin | not specified | not specified | not specified | not specified | not specified | 12VHPWR 16pin | not specified | not specified | 12V-2x6 |
| Fan Size | not specified | not specified | 40mm | 120 millimeter | not specified | 120mm | 140mm | not specified | not specified | 120mm | not specified | 140mm | not specified | not specified | not specified |
| Warranty | not specified | not specified | not specified | 3 Year | not specified | 5 Year | 10 Year | 10 Year | not specified | 3-Year | not specified | not specified | not specified | 10 Year | 10 Year |
| Form Factor | not specified | not specified | Mini ITX | not specified | ATX | not specified | not specified | not specified | TFX | Mini ITX | Flex ATX | ATX | SFX | not specified | ATX |
| PCIe Version | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | PCIe 5.1 |
| Recommended Use | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | Gaming | not specified | Gaming | not specified | not specified | Gaming |
| Connector | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | 12V-2x6 Connector |
| Size | 1000W | not specified | 300W_Gold | 500W | not specified | 600W | 750W | 650W | not specified | 600W | 500W | ARGB PRO SERIES | 750W(V1),Black | 850W | 850W |
| Dimensions | 7.6 × 9.4 × 11.3 inches | 7.1 × 5.9 × 3.4 inches | 5.9 × 3.2 × 1.6 inches | 5.51 × 5.91 × 3.35 inches | 6.3 × 5.91 × 3.39 inches | 5.91 × 5.51 × 3.39 inches | 6.3 × 5.9 × 3.4 inches | 11.8 × 9 × 4.8 inches | 1.1 × 9.7 × 6.5 inches | 5.12 × 4.92 × 2.52 inches | 5.91 × 3.21 × 1.59 inches | 6.61 × 5.91 × 3.35 inches | 9.5 × 4.13 × 7 inches | 5.1 × 5.9 × 3.4 inches | 5.91 × 5.91 × 3.39 inches |
| Weight | 2.31 pounds | 7 pounds | 1.8 pounds | 1.1 pounds | 8.11 pounds | 4.45 pounds | 5 pounds | 4.4 pounds | not specified | 2.56 pounds | 2.87 pounds | 3.53 pounds | 2.2 pounds | 1.87 pounds | 7.15 pounds |
| Color | Black | Black | Gold | not specified | not specified | Black | Gold | not specified | not specified | Black | not specified | not specified | Black | not specified | not specified |
| Model | not specified | 120-PB-0750-KR | FSP300-60FAG | 110-BQ-0500-K1 | PS-TPG-0850F1FAPE-1 | CSP-329 | PS-TPI-0750F3FDGU-1 | 220-GA-0650-X1 | 7823903000 | BN639 | not specified | GMX-RGB-1050PRO | SP750 | 9B17-438-239 | MPG A850G PCIE 5 |
Trade-Offs in Specifications Under $150
Units in this category commonly provide 80 Plus Gold or 80 Plus Bronze efficiency ratings. While fully modular cabling appears on higher-capacity models, several options remain non-modular or semi-modular. Most power supplies on this list lack modern specifications, with only two units providing ATX 3.0 or ATX 3.1 standards and PCIe 5.0 or PCIe 5.1 connectors. Furthermore, choosing specialized form factors like Flex ATX or TFX restricts your continuous output to between 210W and 500W.
- Efficiency rating: Available models reach 80 Plus Gold, with several options using 80 Plus Bronze.
- ATX version: Modern ATX 3.0 and ATX 3.1 revisions are absent from most options.
- Modularity: Non-modular and semi-modular cable setups appear instead of fully detachable cables.
- PCIe version: Dedicated PCIe 5.0 and PCIe 5.1 connectors are limited to select models.
How We Picked These Supplies
This guide tracks PC power supplies matching the Under $150 filter. You see 15 models chosen strictly from their published technical specifications and manufacturer data sheets. We do not physically test these units. Each entry represents a single variant from its product family to give you a clear comparison across form factors, wattages, and efficiency ratings.
The page ranks items by listing products in stock first, then by Amazon sales rank (better-selling products first). Listing details and availability update automatically at least daily. Because models move in or out of this category when qualifications shift, the lineup adjusts to reflect current catalog data.
How to Choose the Right Power Supply
-
Calculate Your Continuous Wattage
You need to match power output to component power demands. Total your processor and graphics card draw before selecting a wattage level. Compact replacements require lower capacities, while modern performance builds demand higher limits. Units range from 210W up to 1050W across this category. A model like the GAMEMAX 1050W ARGB Fully Modular PSU provides high capacity for power-heavy setups. Choosing surplus wattage ensures the supply operates within stable limits under sustained hardware loads without shutting down unexpectedly during peak gaming sessions or compute tasks.
-
Select Your Cabling Type
Cable configurations dictate interior clutter and airflow inside your computer case. Non-modular power supplies retain fixed cable bundles that remain inside the chassis regardless of use. Semi-modular models detach auxiliary peripheral runs while keeping core motherboard wires fixed. Fully modular designs allow you to disconnect every cable, simplifying installation in tight spaces. For example, the EVGA 500 BQ 500W Semi-Modular Power Supply lets you attach only the secondary leads your hardware requires. Check your case interior space to decide if detachable cabling is necessary for your layout.
-
Verify 80 Plus Efficiency
Check the efficiency rating to determine how effectively a power supply converts wall power into clean electricity for components. Units here list 80 Plus Bronze or 80 Plus Gold ratings. Gold models provide higher electrical efficiency and generate less waste heat during everyday operation. Bronze units deliver basic power conversion for entry-level or secondary desktops. The EVGA SuperNOVA 750W Bronze Power Supply offers standard Bronze conversion with Japanese capacitors. If you run your machine for extended hours each day, a higher rating helps maintain cooler internal temperatures.
-
Check ATX Revision Standards
Examine the listed ATX version to ensure compatibility with modern graphics hardware. Newer desktop builds benefit from ATX 3.0 or ATX 3.1 platforms designed to handle sudden load spikes from advanced components. Standard legacy power supplies rely on conventional PCIe 6+2-pin cables. In contrast, modern units supply dedicated high-power connectors. The MSI MPG 850W Gold ATX 3.1 Power Supply includes an updated 12V-2x6 connector and PCIe 5.1 compliance. If you plan to power modern graphics cards without using multi-plug adapter cables, confirm that the power supply specifies ATX 3.0 or ATX 3.1.
-
Evaluate Manufacturer Warranty Coverage
Review the warranty period to understand the expected operational lifespan indicated by the manufacturer. Power supply warranties on this list vary between 5-year coverage and 10-year coverage. Entry-level units often carry shorter protection periods. For instance, the Thermaltake Toughpower GX1 RGB 600W PSU includes a 5-year warranty. Higher-tier options offer 10-year warranty terms, reflecting sustained component longevity such as high-temperature Japanese capacitors. When you plan a desktop build intended to remain in service across multiple component upgrade cycles, pick a power supply with longer published warranty protection.
-
Inspect Fan Cooling Modes
Fan design and cooling modes influence operational noise inside your computer workspace. Standard power supply fans spin continuously to dissipate internal thermal build-up. In contrast, units equipped with zero-RPM modes disable the internal cooling fan entirely when power draw stays under light thresholds. The Thermaltake Toughpower Grand RGB 850W PSU provides zero-RPM operation at lower loads to keep your setup quiet during non-gaming tasks. If you prioritize a silent computer environment during basic productivity or audio work, check whether the power supply specifications indicate low-noise zero-RPM capabilities.
Frequently asked questions
What is the difference between ATX 3.0 and ATX 3.1 power supplies?
ATX 3.1 updates the high-power graphics card connection standards introduced in ATX 3.0. The MSI MPG 850W provides an ATX 3.1 layout featuring a dedicated 12V-2x6 PCIe 5.1 connector. In comparison, the GAMEMAX 1050W uses the ATX 3.0 design standard with PCIe 5.0 graphics connectivity. Both standards handle demanding modern hardware configurations while maintaining 80 Plus Gold electrical efficiency.
Can you install an SFX or SFX-L power supply into a standard ATX PC case?
Yes, you can install smaller power supplies into standard ATX cases if you use an appropriate mounting bracket. The be quiet! SFX L 600W includes an ATX adapter bracket in its specifications, allowing its compact chassis to secure properly within standard ATX mounting points. Units like the Lian Li 750W SFX provide compact dimensions for small enclosures but require compatible bracket hardware for ATX frames.
What makes Japanese capacitors important in power supply specifications?
Japanese capacitors indicate component construction designed to withstand higher operating temperatures and continuous electrical demands. Models such as the EVGA SuperNOVA 850 G7, MSI MPG 850W, and Thermaltake Toughpower GX1 specify Japanese capacitors, with the GX1 listing a 105°C temperature tolerance. Selecting units with these components ensures stable power delivery under sustained desktop gaming loads across extended periods of operation.
How does a zero-RPM fan mode function on a desktop power supply?
A zero-RPM fan mode halts the cooling fan entirely during low power consumption to eliminate operating noise. The Thermaltake Toughpower Grand RGB 850W incorporates zero-RPM operation during lower loads, turning the fan on only when internal temperatures or power draws rise. This design keeps your desktop setup quiet during basic tasks while maintaining active airflow when running demanding applications.
Which power supply form factor is required for 1U or ultra-compact Mini-ITX cases?
Flex ATX power supplies are specifically designed for 1U server chassis and slim Mini-ITX enclosures. Units like the SilverStone 500W Flex ATX measure 3.21 inches wide and 1.59 inches tall to fit tight layouts. Similarly, the FSP 300W Flex ATX uses an integrated 40mm fan to provide cooling inside specialized miniature cases where standard ATX or SFX supplies physically cannot fit.
What is the operational difference between fully modular, semi-modular, and non-modular power supplies?
The difference centers on which cables permanently attach to the supply housing. A fully modular model like the Corsair SF 1000W allows you to detach every cable. A semi-modular unit like the EVGA 500 BQ keeps primary power lines hardwired while offering modular peripheral connections. A non-modular design like the Thermaltake Toughpower GX1 600W has all power leads permanently attached to the chassis.
Can a TFX power supply replace a standard ATX unit in a desktop build?
No, a TFX power supply uses a distinct narrow form factor intended for slim proprietary enclosures rather than standard ATX cases. The Lenovo ThinkCentre 210W TFX model measures 1.1 inches in length and 9.7 inches in width to fit specific compact business desktops. Its physical dimensions and screw placements prevent it from mounting properly into standard ATX power supply brackets without modification.