FSP SFX Pro 450W Bronze Alternatives: 6 Similar Picks Compared
As an Amazon Associate we earn from qualifying purchases. Links on this page are affiliate links.
Finding fsp sfx pro 450w power alternatives helps you balance physical dimensions, wattage, and cabling options for your setup. The FSP SFX Pro 450W Bronze power supply serves small-form-factor builds effectively with its compact dimensions of 4 by 2.5 by 5 inches. It provides 450 watts of continuous output, 80 Plus Bronze efficiency, and a DC-to-DC module design that maintains steady voltage regulation. Its temperature-controlled intelligent sleeve fan regulates internal airflow, while flat black ribbon cables simplify routing inside tight enclosures. An included SFX-to-ATX mounting bracket also allows installation in standard desktop chassis.
You might still need a different unit if your build demands more capacity, different cabling, or an alternative form factor. Systems running higher-tier hardware require greater wattage headroom, such as 500W, 650W, or 750W capacities. Standard ATX enclosures do not require small SFX footprints, and semi-modular or modular cable layouts help reduce interior clutter. In this guide, you will find 6 power supplies selected because their specifications overlap with the original. These options feature shared traits like 80 Plus Bronze efficiency, bundled ATX brackets, or compact dimensions.
Comparing FSP SFX Pro Alternatives
Corsair CX-M Modular Power Supply
The Corsair CX-M delivers 750W of output, offering 300W more continuous capacity than the 450W FSP SFX Pro. It also features modular cabling, which allows you to detach unused cables to simplify routing inside your enclosure. Both units share an 80 Plus Bronze efficiency rating. However, this Corsair model is a renewed unit and does not offer the compact SFX form factor of the FSP, which measures 4 by 2.5 by 5 inches and includes an SFX-to-ATX bracket. You also give up the FSP's DC-to-DC design and ribbon cables. Choose the Corsair CX-M if your build needs 750W capacity and modular cabling in a case that does not require an SFX supply.
EVGA SuperNOVA 750W Bronze Power Supply
The EVGA SuperNOVA 750W provides 300W more output than the 450W FSP SFX Pro, along with hybrid modular cabling and Japanese capacitors. Both share an 80 Plus Bronze rating. What you give up is compact packaging. The EVGA measures 5.9 by 3.4 by 7.1 inches and weighs 7 pounds, making it much bulkier and heavier than the FSP unit, which measures 4 by 2.5 by 5 inches and weighs 2.69 pounds. The EVGA also lacks an SFX form factor and an SFX-to-ATX adapter bracket. You should pick this EVGA power supply if you are outfitting a standard desktop case that accommodates larger power supplies and demands 750W headroom.
EVGA 650 BQ 650W Semi-Modular PSU
The EVGA 650 BQ offers 650W of power, granting 200W more capacity than the 450W FSP SFX Pro. It features semi-modular cabling, a large 140mm cooling fan, and a five-year warranty, while matching the FSP's 80 Plus Bronze efficiency. In return, you give up the SFX form factor. At 5.91 by 3.35 by 5.51 inches and 5 pounds, the EVGA is noticeably larger and heavier than the FSP, which measures 4 by 2.5 by 5 inches and weighs 2.69 pounds. It cannot fit compact Mini-ITX cases designed strictly for SFX units. Choose the EVGA 650 BQ if your system requires 650W and semi-modular flexibility inside a standard case.
EVGA 500 BQ 500W Semi-Modular Power Supply
The EVGA 500 BQ delivers 500W of power, giving you 50W more output than the 450W FSP SFX Pro. It also features semi-modular cabling to help reduce clutter and uses a 120mm fluid dynamic bearing fan rather than the FSP's intelligent sleeve fan. Both units share an 80 Plus Bronze efficiency rating. What you sacrifice is the compact SFX form factor. The EVGA measures 5.91 by 3.35 by 5.51 inches, whereas the FSP measures 4 by 2.5 by 5 inches and includes an SFX-to-ATX adapter bracket. Select the EVGA 500 BQ if your build fits standard-sized power supplies and you prefer semi-modular cable management.
SilverStone 450W SFX Bronze Power Supply
The SilverStone 450W SFX Bronze unit matches the FSP SFX Pro with 450W of continuous power delivery and 80 Plus Bronze efficiency. Both models are built to the SFX form factor and provide ATX mounting compatibility for installation in standard cases. However, the SilverStone lists dimensions of 7 by 4 by 9 inches under model SST-ST45SF-V3-USA, whereas the FSP specifies dimensions of 4 by 2.5 by 5 inches, a weight of 2.69 pounds, and all-black ribbon cables. The FSP also highlights a dedicated DC-to-DC module design. Choose the SilverStone 450W SFX if you want a dedicated alternative SFX unit from SilverStone with bundled ATX mounting versatility.
SilverStone 300W SFX Bronze Power Supply
The SilverStone 300W SFX power supply measures 4.92 by 2.5 by 3.94 inches, offering a shorter 3.94-inch length compared to the 5-inch length of the FSP SFX Pro. Both share an 80 Plus Bronze efficiency rating, an SFX form factor, and an included ATX adapter bracket. However, the SilverStone provides 300W of continuous output, which gives up 150W of capacity compared to the 450W FSP. It also lacks the FSP's DC-to-DC module design and all-black ribbon cabling. Pick the SilverStone 300W if you are powering a modest, low-draw small-form-factor build where the shorter chassis length provides needed clearance inside your enclosure.
Quick picks
Our 7 picks
FSP SFX Pro 450W Bronze Power Supply
Best for: budget small-form-factor desktop builds
- Wattage
- 450W
- Efficiency Rating
- 80 Plus Bronze
- Modularity
- Non-Modular
- Form Factor
- Mini ITX
- Dimensions
- 5 × 4 × 2.5 inches
- Weight
- 2.69 pounds
The FSP SFX Pro 450W Bronze Power Supply is a compact SFX unit delivering 450 watts with 80 PLUS Bronze efficiency. It features a DC-to-DC structure, an intelligent sleeve fan that adjusts speed by temperature, and all-black ribbon cables. Measuring 4 by 5 by 2.5 inches, it includes an SFX-to-ATX adapter bracket. This power supply suits you if you assemble an entry-level or small-form-factor desktop inside compact or standard enclosures.
Pros
- 80 PLUS Bronze efficiency rating
- DC-to-DC structure for voltage regulation
- Comes with an SFX-to-ATX adapter bracket
- All-black ribbon cables for compact routing
Cons
- Uses a sleeve fan instead of fluid dynamic or ball bearings
- 450-watt output ceiling limits power-hungry components
Good fit if
- You want an SFX power supply that includes an ATX mounting bracket.
- You are building an office or budget PC requiring 450 watts or less.
Skip if
- You require more than 450 watts of total system power.
- You need an efficiency rating higher than 80 PLUS Bronze.
Verdict: FSP SFX Pro 450W Bronze Power Supply is an efficient SFX unit suited for small builds and standard cases via its included adapter bracket. Its 450W output and DC-to-DC design deliver reliable voltage regulation for low-demand hardware.
Corsair CX-M Modular Power Supply
Best for: 750W modular builds seeking Bronze efficiency
- Efficiency Rating
- 80 Plus Bronze
- Modularity
- Modular
The Corsair CX750M is a modular power supply with an 80 Plus Bronze efficiency rating, available as a renewed unit. If you need higher wattage than a 450W model, this unit delivers a 750W rating for your system. Its modular design lets you attach only the cables your setup requires. This unit suits you if you want a Bronze-rated modular option with 750W capacity.
Pros
- 80 Plus Bronze efficiency rating
- Modular cable configuration
- 750W rated capacity
Cons
- Renewed condition rather than brand new
- Connector counts and dimensions not detailed in data
Good fit if
- You need 750W of output with modular cable management.
- You want an 80 Plus Bronze efficiency certification.
- You are comfortable purchasing a renewed power supply.
Skip if
- You require a brand-new factory-sealed unit.
- You need an efficiency rating higher than 80 Plus Bronze.
Verdict: Corsair CX750M Modular Bronze PSU (Renewed) provides 750W of power with modular cabling and 80 Plus Bronze efficiency. It serves builders who need higher wattage and modular cables in a renewed unit.
EVGA SuperNOVA 750W Bronze Power Supply
Best for: standard ATX cases needing 750W capacity
- Wattage
- 750W
- Efficiency Rating
- 80PLUS Bronze
- Modularity
- Hybrid Modular
- Dimensions
- 7.1 × 5.9 × 3.4 inches
- Weight
- 7 pounds
The EVGA SuperNOVA 750W Bronze Power Supply is an ATX form factor alternative offering 750W of total output and 80 PLUS Bronze efficiency. Its hybrid modular layout helps you manage internal clutter by letting you detach surplus cables, while Japanese capacitors support component reliability. Because this unit measures 7.1 inches long and weighs seven pounds, it suits your build if you have a standard desktop chassis rather than a compact SFX enclosure.
Pros
- 750W power output
- 80 PLUS Bronze certification up to 85% efficiency
- Hybrid modular design reduces internal clutter
- Japanese brand capacitors
- Full protection suite including OVP, UVP, OCP, OPP, SCP, and OTP
Cons
- Standard ATX length of 7.1 inches does not fit SFX enclosures
- Hybrid modular layout keeps some core cables permanently attached
- Heavier unit weight at 7 pounds
Good fit if
- You require 750W of continuous power for high-draw hardware.
- You build inside a desktop case that accepts ATX power supplies.
- You want hybrid modular cabling to cut down on unused wires.
Skip if
- You need a compact SFX power supply for a small-form-factor case.
- You prefer a fully modular layout where every cable detaches.
Verdict: EVGA SuperNOVA 750W Bronze Power Supply provides 750W of hybrid modular power with Japanese capacitors and 80 PLUS Bronze efficiency. It serves standard desktop cases that do not require a compact SFX format.
EVGA 650 BQ 650W Semi-Modular PSU
Best for: standard cases needing higher wattage headroom
- Wattage
- 650W
- Efficiency Rating
- 80+ Bronze
- Modularity
- Semi Modular
- Fan Size
- 140 millimeter
- Warranty
- 5 Year
- Dimensions
- 5.51 × 5.91 × 3.35 inches
The EVGA 650 BQ is a 650W semi-modular power supply offering 80 Plus Bronze efficiency. It provides more wattage headroom than 450W alternatives and features a large 140mm cooling fan with a Teflon nano-steel bearing. With standard ATX dimensions measuring 5.91 by 5.51 by 3.35 inches, it suits you if your chassis accepts full-size units and your hardware demands up to 650W of power under typical loads.
Pros
- 650W continuous power output
- Semi-modular cabling layout
- 140mm Teflon nano-steel bearing fan
- Five-year warranty coverage
- Includes OVP, UVP, OCP, OPP, and SCP protections
Cons
- Standard ATX size is larger than compact SFX units
- Semi-modular design leaves core cables permanently attached
Good fit if
- You need 650W of capacity for higher-draw PC components.
- You have a chassis that fits standard ATX power supplies.
- You prefer a long five-year manufacturer warranty period.
Skip if
- You require a compact SFX form-factor power supply.
- You want a fully modular power supply where all cables detach.
Verdict: EVGA 650 BQ 650W Semi-Modular PSU delivers 650W of 80 Plus Bronze power with a 140mm cooling fan and a five-year warranty. It serves as a higher-capacity alternative for systems with room for standard-sized power supplies.
EVGA 500 BQ 500W Semi-Modular Power Supply
Best for: standard builds needing 500W semi-modular power
- 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 standard desktop enclosures. It delivers 80 Plus Bronze efficiency with up to 85 percent efficiency under typical loads. The unit features a 120mm fluid dynamic bearing fan and built-in heavy-duty protections including OVP, UVP, OCP, OPP, and SCP. If you want extra wattage headroom over standard 450W units and prefer semi-modular cable management, this power supply fits standard builds.
Pros
- 500W output with 80 Plus Bronze efficiency
- Semi-modular cable design
- 120mm fluid dynamic bearing fan
- Built-in OVP, UVP, OCP, OPP, and SCP protections
Cons
- Standard dimensions rather than a compact SFX form factor
- Three-year warranty period
Good fit if
- You need 500W of power with 80 Plus Bronze efficiency
- You prefer semi-modular cabling to reduce interior clutter
- You have a case that fits standard power supply dimensions
Skip if
- You need a compact SFX-sized power supply
- You prefer a fully modular cable design
Verdict: EVGA 500 BQ Semi-Modular Bronze PSU provides 500W of reliable power with semi-modular flexibility for desktop builds. Its 120mm fluid dynamic bearing fan and suite of electrical protections ensure stable everyday operation.
SilverStone 450W SFX Bronze Power Supply
Best for: compact builds needing an ATX bracket
- Wattage
- 450W
- Efficiency Rating
- 80 Plus Bronze
- Form Factor
- SFX
- Dimensions
- 9 × 7 × 4 inches
This SilverStone unit delivers 450W of continuous power with 80 Plus Bronze efficiency in a compact SFX form factor. It includes an ATX adapter bracket so you can mount it into larger cases as well. The design features a single +12V rail rated for 36A and supports continuous 24/7 operation up to 40°C. It suits you if you need a compact 450W power supply for small-form-factor or standard chassis.
Pros
- Supports standard SFX and ATX mounting via included bracket
- Single +12V rail rated at 36A
- Continuous 450W output rated for 24/7 operation at 40°C
- 80 Plus Bronze efficiency certification
Cons
- V3.0 continuous temperature rating is capped at 40°C instead of 50°C
- Total output limited to 450W
Good fit if
- You need an SFX power unit that comes with an ATX mounting bracket.
- You run a setup requiring continuous 24/7 power delivery at 450W.
- You need up to 36A on a single +12V rail.
Skip if
- You require more than 450W of total system power.
- You operate your system in ambient temperatures above 40°C.
Verdict: SilverStone 450W Bronze SFX Power Supply provides reliable 450W continuous power delivery in an SFX footprint with included ATX mounting flexibility.
SilverStone 300W SFX Bronze Power Supply
Best for: compact low-draw SFX and ATX builds
- Wattage
- 300W
- Efficiency Rating
- 80 Plus Bronze
- Fan Size
- 92mm
- Form Factor
- SFX
- Dimensions
- 3.94 × 4.92 × 2.5 inches
The SilverStone 300W Bronze SFX Power Supply is a compact power unit built for space-restricted cases. It delivers 300W of continuous power at 40°C and holds an 80 Plus Bronze efficiency certification. Equipped with a 92mm cooling fan and an included ATX mounting bracket, it fits standard SFX or ATX chassis. This suits you if you run lower-wattage components requiring steady continuous operation.
Pros
- Includes an ATX adapter bracket for standard chassis compatibility
- Rated for 300W continuous output at 40°C operating temperature
- 80 Plus Bronze efficiency rating
- Equipped with a 92mm cooling fan
Cons
- 300W capacity offers less power headroom than 450W models
- Continuous output rating capped at 40°C operating temperature
Good fit if
- You need a compact SFX power supply with an included ATX mounting bracket.
- You run a low-power system that stays comfortably within a 300W continuous envelope.
Skip if
- You need 450W or higher power delivery for your components.
- You operate your system in environments exceeding a 40°C temperature threshold.
Verdict: SilverStone 300W Bronze SFX Power Supply delivers steady continuous output and 80 Plus Bronze efficiency for modest small-form-factor systems. Its bundled ATX bracket ensures versatile mounting across compact and standard enclosures alike.
Specifications side by side
| Spec | FSP SFX Pro 450W Bronze Power Supply | Corsair CX-M Modular Power Supply | EVGA SuperNOVA 750W Bronze Power Supply | EVGA 650 BQ 650W Semi-Modular PSU | EVGA 500 BQ 500W Semi-Modular Power Supply | SilverStone 450W SFX Bronze Power Supply | SilverStone 300W SFX Bronze Power Supply |
|---|---|---|---|---|---|---|---|
| Wattage | 450W | not specified | 750W | 650W | 500W | 450W | 300W |
| Efficiency Rating | 80 Plus Bronze | 80 Plus Bronze | 80PLUS Bronze | 80+ Bronze | 80+ Bronze | 80 Plus Bronze | 80 Plus Bronze |
| Modularity | Non-Modular | Modular | Hybrid Modular | Semi Modular | Semi Modular | not specified | not specified |
| Fan Size | not specified | not specified | not specified | 140 millimeter | 120 millimeter | not specified | 92mm |
| Warranty | not specified | not specified | not specified | 5 Year | 3 Year | not specified | not specified |
| Form Factor | Mini ITX | not specified | not specified | not specified | not specified | SFX | SFX |
| Size | 450W | not specified | not specified | 650W | 500W | 450W | 300W V2 |
| Dimensions | 5 × 4 × 2.5 inches | not specified | 7.1 × 5.9 × 3.4 inches | 5.51 × 5.91 × 3.35 inches | 5.51 × 5.91 × 3.35 inches | 9 × 7 × 4 inches | 3.94 × 4.92 × 2.5 inches |
| Weight | 2.69 pounds | not specified | 7 pounds | 5 pounds | 1.1 pounds | not specified | not specified |
| Color | 80 Plus Bronze | not specified | Black | not specified | not specified | not specified | not specified |
| Model | PPA450AA01 | not specified | 120-PB-0750-KR | 110-BQ-0650-V1 | 110-BQ-0500-K1 | SST-ST45SF-V3-USA | SST-ST30SF V2 |
If you also need gym equipment, you can compare body solid gpr378p4 pro power rack alternatives by dimensions.
Frequently asked questions
What small form factor alternatives match the FSP SFX Pro 450W wattage?
The SilverStone 450W SFX Bronze power supply matches the 450W continuous output of the FSP unit. It uses the compact SFX form factor, making it suitable for tight cases. Like the FSP model, it includes an ATX bracket so you can mount it into larger chassis if your setup changes.
Can you fit standard ATX alternatives into a small-form-factor case?
Standard ATX alternatives cannot fit into dedicated SFX chassis because their physical dimensions are too large. Units such as the EVGA SuperNOVA 750W measure 5.9 by 3.4 by 7.1 inches, requiring a full-sized desktop case. You should choose dedicated SFX units like the SilverStone 450W or SilverStone 300W for compact builds.
Is there a lower wattage SFX alternative for low power systems?
The SilverStone 300W SFX Bronze unit provides a lower-wattage option for modest systems. It delivers steady continuous power with 80 Plus Bronze efficiency in dimensions of 4.92 by 2.5 by 3.94 inches. It also includes an ATX bracket, giving you flexibility to install it into standard enclosures.
What cooling fan sizes do the EVGA BQ alternatives use?
The EVGA BQ series alternatives feature different fan configurations based on their capacity. The EVGA 650 BQ utilizes a 140mm cooling fan to manage thermal dissipation. In contrast, the smaller EVGA 500 BQ is equipped with a 120mm fluid dynamic bearing fan alongside a suite of electrical protections.
Which alternatives provide semi-modular cable management?
Both the EVGA 650 BQ and the EVGA 500 BQ provide semi-modular cable configurations. This setup connects essential core cables permanently while allowing you to detach peripheral cables you do not need. This helps you reduce interior clutter in standard desktop cases compared to fixed-cable designs.
What efficiency rating do these FSP SFX Pro alternatives have?
All 6 alternatives on this list share an 80 Plus Bronze efficiency rating, matching the FSP SFX Pro. This rating confirms that the power supplies maintain consistent electrical efficiency under typical workloads. Choosing between them depends on your required wattage and whether your case takes an SFX or standard ATX form factor.
What makes the EVGA SuperNOVA 750W different from the FSP SFX Pro?
The EVGA SuperNOVA 750W differs in form factor, internal components, and cable design. It features Japanese capacitors and a hybrid modular layout for full-sized desktop cases. Weighing 7 pounds and measuring 5.9 by 3.4 by 7.1 inches, it is built for standard enclosures rather than compact SFX chassis.