Best TFX PC Power Supplies in 2026: 15 Picks Ranked by Specs
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Finding the right TFX PC power supply requires matching physical dimensions, connector types, and continuous wattage to your compact build. The BackPlanePro 300W TFX Power Supply leads the rankings by providing a 300W capacity and active PFC within standard MicroATX slim dimensions.
We compared 15 products based strictly on the specifications published on the listings. Whether you are maintaining a slim office PC or upgrading hardware, this guide helps you decide on the proper dimensions, output wattage, and connector configuration for your computer in 2026.
Quick picks
The best fit for you
- You need a standard replacement for slim MicroATX builds BackPlanePro 300W TFX Power Supply It delivers 300W capacity with active PFC in standard TFX dimensions.
- You require high wattage with 80 Plus Gold efficiency SilverStone 500W Gold TFX Power Supply It supplies 500W continuous output with an 80 Plus Gold efficiency rating.
- You want dedicated graphics power in a Lenovo system LXun 310W Lenovo TFX Power Supply Dual 6+2-pin connectors provide dedicated power alongside a 310W total capacity.
- You want to test voltages before installing your supply Yosoo Health Gear LCD Power Supply Tester An integrated LCD display gives direct voltage readouts to verify unit health.
Our 15 picks
BackPlanePro 300W TFX Power Supply
Best for: MicroATX slim desktop replacements
- Form Factor
- TFX
- Wattage
- 300W
- Fan Size
- 80mm
- Warranty
- One Year
- Dimensions
- 6.89 × 2.56 × 3.35 inches
- Weight
- 3 pounds
View on Amazon: BackPlanePro 300W TFX Power Supply (paid link)
The BackPlanePro 300W TFX Power Supply gives you a replacement power source designed for MicroATX slim cases. It delivers 300W of output with active PFC auto-switching and uses an 80mm fan for internal cooling. Measuring 6.89 inches long by 2.56 inches wide and weighing three pounds, this grey unit fits compact chassis requiring TFX dimensions. It suits you if you need a direct replacement for slim desktop systems.
Pros
- 300W output suited for MicroATX slim cases
- Active PFC with auto-switching
- 80mm internal cooling fan
- Standard compact TFX footprint
Cons
- No 80 PLUS efficiency certification listed
- One-year warranty period
- Cable configuration details not specified
Good fit if
- You need a 300W TFX replacement unit for a MicroATX slim chassis.
- You require active PFC with automatic voltage switching.
- You are replacing factory power supplies in Dell Inspiron 530s or 531s setups.
Skip if
- You require more than 300W for higher-power components.
- You want an official 80 PLUS Bronze or Gold efficiency rating.
- You need standard ATX or SFX mounting specifications.
Verdict: BackPlanePro 300W TFX Power Supply provides essential 300W capacity and active PFC for MicroATX slim systems. Its standard dimensions make it a solid replacement option among 15 TFX picks in 2026.
Apevia 300W TFX Power Supply
Best for: standard low-power TFX chassis replacements
- Form Factor
- TFX
- Wattage
- 300W
- Fan Size
- 80mm
- Dimensions
- 6.75 × 3.23 × 2.5 inches
- Weight
- 2.1 pounds
View on Amazon: Apevia 300W TFX Power Supply (paid link)
The Apevia 300W TFX Power Supply gives you a compact 300W power source designed for small chassis setups. It delivers up to 20A on the single +12V rail and maintains a 5% output voltage tolerance across the primary 12V, 5V, and 3.3V lines. Internal cooling relies on a single 80mm fan. This unit suits you if you need a standard TFX replacement unit with dual 115V and 230V voltage input support.
Pros
- 20A output rating on the +12V rail
- 115V to 230V AC input switch support
- Active cooling via an 80mm ventilation fan
- 5% voltage regulation on 12V, 5V, and 3.3V rails
Cons
- Limited to 300W total continuous capacity
- No 80 PLUS efficiency rating listed
- 12A ceiling on +3.3V and +5V rails
Good fit if
- You need a 300W TFX power supply for compact PC builds.
- You require 115V and 230V AC input compatibility.
- You run hardware that stays within a 20A +12V rail limit.
Skip if
- You need more than 300W of total system power.
- You require an official 80 PLUS efficiency certification.
Verdict: Apevia 300W TFX Power Supply delivers 300W of compact power with an 80mm cooling fan and multi-voltage input. It provides stable voltage tolerances for low-draw small-form-factor systems.
Lenovo ThinkCentre 210W TFX Power Supply
Best for: low-draw Lenovo ThinkCentre system replacements
- Form Factor
- TFX
- Wattage
- 210W
- Dimensions
- 1.1 × 9.7 × 6.5 inches
View on Amazon: Lenovo ThinkCentre 210W TFX Power Supply (paid link)
This Lenovo unit provides a 210W power supply in the standard TFX form factor designed for ThinkCentre systems. It supports an input voltage range of 100 to 240Vac and carries ES7 specification compliance. If you need an authentic replacement power supply for your low-draw ThinkCentre desktop, this unit delivers the specific wattage and footprint you require without extra bulk or complex configuration.
Pros
- 210W total power capacity
- Broad 100-240Vac input voltage range
- ES7 specification compliance
- Standard TFX form factor
Cons
- Low 210W ceiling limits component choices
- Designed specifically for ThinkCentre configurations
Good fit if
- You need a replacement unit for a compatible Lenovo ThinkCentre.
- You run low-draw components requiring 210W or less.
- You operate on an input voltage between 100 and 240Vac.
Skip if
- You require more than 210W for high-power PC components.
- You build a standard desktop that does not accept ThinkCentre hardware.
Verdict: Lenovo ThinkCentre 210W TFX Power Supply delivers dedicated replacement power with wide 100 to 240Vac input support for compact setups. It is an exact-fit 210W option for low-draw ThinkCentre desktop configurations.
SilverStone 500W Gold TFX Power Supply
Best for: compact systems needing efficient 500W TFX power
- Form Factor
- TFX
- Wattage
- 500W
- Efficiency Rating
- 80 PLUS Gold
- Modularity
- Fixed Cable
- Fan Size
- 80mm
- Dimensions
- 6.9 × 3.4 × 2.6 inches
View on Amazon: SilverStone 500W Gold TFX Power Supply (paid link)
The SilverStone 500W 80 Plus Gold TFX Power Supply delivers 500 watts of continuous power in a compact TFX enclosure measuring 6.9 by 3.4 by 2.6 inches. It features 80 PLUS Gold certified electrical efficiency, continuous 24/7 operation at up to 50°C, and an internal 80mm cooling fan rated down to 18 dBA. This unit suits you if you need high-efficiency continuous power for standard TFX chassis.
Pros
- 80 PLUS Gold efficiency certification
- 500W continuous output rated at 50°C operating temperature
- Low-noise 80mm cooling fan operating down to 18 dBA
- Equipped with multiple protection circuitry
Cons
- Fixed cabling design cannot be detached to save case space
- Capacity caps at 500W output
Good fit if
- You need 500W continuous output for a standard TFX chassis.
- You want 80 PLUS Gold efficiency to reduce power waste and heat.
- You operate your system continuously in environments up to 50°C.
Skip if
- You require modular cables for easier routing in tight cases.
- You need higher output than 500W for your hardware.
Verdict: SilverStone 500W 80 Plus Gold TFX Power Supply delivers high-efficiency 500W output for small builds needing standard TFX proportions. Its 50°C continuous rating and quiet 80mm fan provide solid technical capability in limited chassis volumes.
Be Quiet! TFX Power 3 TFX Power Supply
Best for: compact systems needing standard TFX dimensions
- Form Factor
- TFX
- Dimensions
- 6.89 × 3.35 × 2.56 inches
- Weight
- 3.09 pounds
View on Amazon: Be Quiet! TFX Power 3 TFX Power Supply (paid link)
The Be Quiet TFX Power 3 is a dedicated TFX form factor power supply designed for small desktop chassis. It features a black casing and measures 6.89 inches long, 3.35 inches wide, and 2.56 inches high. At approximately 3.09 pounds, it provides standard compact dimensions. This model suits you if you need a direct physical replacement matching standard TFX enclosure specifications.
Pros
- Standard TFX form factor
- Dimensions of 6.89 by 3.35 by 2.56 inches
- Black exterior finish
- Weighs approximately 3.09 pounds
Cons
- Wattage output is not listed in the specifications
- Connector types and quantities not provided in the data
Good fit if
- You need a power supply built to standard TFX dimensions.
- You prefer an all-black power supply for your small chassis.
Skip if
- You need verified wattage output specifications before purchasing.
- You require specific connector counts listed in the specs.
Verdict: Be Quiet TFX Power 3 Power Supply provides a black casing and standard TFX dimensions for compact desktop enclosures.
MAXROB 250W TFX Power Supply
Best for: low-power FSP TFX power supply replacements
- Form Factor
- TFX
- Wattage
- 250W
View on Amazon: MAXROB 250W TFX Power Supply (paid link)
The MAXROB 250W TFX Power Supply is a replacement unit built for compact systems that require the TFX form factor. It delivers a 250W output capacity, targeting low-power desktop builds or legacy replacements for compatible FSP power units. If you are servicing a small-form-factor desktop that matches these replacement specifications and does not need high wattage, this supply provides standard TFX dimensions to fit tight chassis layouts without requiring physical chassis modifications.
Pros
- Standard TFX form factor
- 250W continuous power rating
- Direct replacement compatibility for select FSP units
Cons
- Modest 250W capacity limits component upgrades
- No 80 PLUS efficiency certification listed
- Connector types and cable lengths omitted from specifications
Good fit if
- You need a 250W replacement unit for compatible FSP power supplies.
- You are maintaining a low-power, small-form-factor desktop build.
Skip if
- You require more than 250W for power-demanding hardware.
- You want an independently certified 80 PLUS efficiency rating.
Verdict: MAXROB 250W TFX Power Supply serves as a direct 250W replacement option for specific FSP-based small-form-factor systems. Its compact TFX dimensions fit slim chassis that do not need higher wattage capacity.
Yosoo Health Gear LCD Power Supply Tester
Best for: bench testing TFX power supply outputs
- Form Factor
- TFX
- Display Type
- LCD Display
- Dimensions
- 3.94 × 1.97 × 0.79 inches
- Weight
- 2.82 ounces
View on Amazon: Yosoo Health Gear LCD Power Supply Tester (paid link)
This unit is a diagnostic tester rather than an internal power supply, designed to test TFX, ATX, BTX, and ITX units. It features an LCD display that reports output voltages and Power Good (PG) values from 20-pin or 24-pin connections. It also includes an audible buzzer alarm for detected defects. It suits you if you need a dedicated tool to inspect your TFX power supply cables and voltage rails before system assembly.
Pros
- Reads 20-pin and 24-pin connectors with an LCD screen for voltages and PG values
- Audible buzzer alarm sounds automatically when output defects are detected
- Inspects multiple form factors including TFX, ATX, BTX, and ITX units
- Includes dedicated ports to check P4, P6, P8, SATA, and IDE lines
Cons
- Functions strictly as a diagnostic tester rather than an actual PC power supply
- External IDE, SATA, P6, and P8 connections rely on light indicators without LCD voltage readouts
Good fit if
- You need to inspect TFX voltage rails and PG values prior to system installation.
- You want an audible warning buzzer to flag power defects during testing.
Skip if
- You need an internal power supply to deliver electrical power to PC hardware.
- You require numeric LCD voltage readings for SATA or IDE connectors.
Verdict: Yosoo Health Gear LCD Power Supply Tester is a diagnostic tool for checking TFX and ATX voltage lines rather than a PC power supply. It provides clear LCD voltage readouts and warning buzzers to verify unit health before deployment.
EBTOOLS TFX Replacement Power Supply
Best for: compatible 10-pin small desktop chassis replacements
- Form Factor
- TFX
- Wattage
- 210W
View on Amazon: EBTOOLS TFX Replacement Power Supply (paid link)
This EBTOOLS TFX power supply provides a direct replacement module for compact desktop systems such as the m410, m415, m610, m425, and m428 chassis. You get a dedicated 10-pin motherboard connector alongside a 4-pin CPU lead, with rated output options of 180W or 210W. Built with aluminum heat sinks and Japanese solid capacitors, it supplies low-wattage hardware setups requiring proprietary pin configurations.
Pros
- Features Japanese solid capacitors and aluminum heat sinks
- Available in 180W and 210W power ratings
- Direct fit for m410, m415, m610, m425, and m428 chassis
Cons
- Limited to a 10-pin motherboard connector and a single 4-pin CPU connector
- Maximum rated capacity tops out at 210W
- No PCIe power connectors or standard 24-pin ATX leads
Good fit if
- You need a direct replacement unit for m410, m415, m610, m425, or m428 desktop systems.
- You require a power supply with a 10-pin motherboard connector and a 4-pin CPU connector.
Skip if
- You need a standard 20-pin or 24-pin ATX motherboard connector.
- You run components requiring more than 210W of total power.
Verdict: EBTOOLS TFX Replacement Power Supply delivers targeted power for select prebuilt chassis needing a proprietary 10-pin motherboard interface. Its compact TFX profile and solid capacitor build suit low-demand maintenance swaps.
LXun 180W TFX Power Supply
Best for: replacing compatible low-draw small-form-factor office PC supplies
- Form Factor
- TFX
- Wattage
- 180W
- Warranty
- 1 Year
- Dimensions
- 5.91 × 3.23 × 2.72 inches
- Weight
- 1.98 pounds
View on Amazon: LXun 180W TFX Power Supply (paid link)
This LXun 180W TFX power supply provides a compact replacement unit for specific desktop systems. It delivers up to 180W of DC output and supports an AC input range from 100V to 240V at 50/60Hz. Measuring 5.91 inches long, 3.23 inches wide, and 2.72 inches high, it fits into slim enclosures. It suits you if you need to restore power to a compatible low-draw desktop setup.
Pros
- Maximum DC power output of 180W
- Universal 100V to 240V AC input range
- Standard TFX dimensions at 5.91 by 3.23 by 2.72 inches
- Includes 1-year service coverage
Cons
- Low 180W maximum output limits component upgrades
- No 80 PLUS energy efficiency rating specified
Good fit if
- You need a replacement unit for compatible office desktops like the Lenovo M710 or M910.
- You operate a low-draw system that requires no more than 180W of power.
Skip if
- You need 300W or more for dedicated expansion cards.
- You want an officially certified 80 PLUS efficiency rating.
Verdict: LXun 180W TFX Power Supply is a specialized low-wattage replacement unit tailored for compatible compact office PCs. It provides reliable factory-level power delivery within standard TFX dimensions.
Ciciglow 210W TFX Power Supply
Best for: m410 to m428 small chassis desktop replacements
- Form Factor
- TFX
- Wattage
- 210W
View on Amazon: Ciciglow 210W TFX Power Supply (paid link)
This Ciciglow unit is a 210W replacement power supply built in the compact TFX form factor. It provides a proprietary 10-pin motherboard connector alongside a standard 4-pin CPU lead, matching systems like the m410, m415, m610, m425, and m428 small chassis. Internally, it features aluminum heat sinks and Japanese solid capacitors. It suits you if you need a direct power swap for specific prebuilt office desktop chassis.
Pros
- Japanese solid capacitors and aluminum heat sinks
- Drop-in compatibility with m410, m415, m610, m425, and m428 chassis
- Standard TFX form factor profile
Cons
- Proprietary 10-pin motherboard and 4-pin CPU leads only
- Low 210W output restricts component upgrades
- No PCIe or SATA connectors listed in specifications
Good fit if
- You need a replacement unit for an m410, m415, m610, m425, or m428 chassis.
- You need a 10-pin motherboard and 4-pin CPU power configuration.
Skip if
- You require standard 24-pin ATX motherboard power.
- You run dedicated graphics cards needing PCIe power cables.
Verdict: Ciciglow 210W TFX Power Supply serves as a dedicated replacement for specific small-chassis desktops requiring a 10-pin motherboard interface. Its fixed cabling and 210W limit mean it works strictly for targeted low-power repairs.
LXun 310W Lenovo TFX Power Supply
Best for: Lenovo desktop graphics card upgrades
- Form Factor
- TFX
- Wattage
- 310W
- PCIe Connector Type
- 6+2pin
- Warranty
- 1 Year
- Dimensions
- 5.9 × 3.2 × 2.6 inches
- Weight
- 1.79 pounds
View on Amazon: LXun 310W Lenovo TFX Power Supply (paid link)
This unit is a 310W TFX power supply designed for compatible Lenovo ThinkCentre and desktop systems. It provides up to 310W across three +12V rails and features a proprietary 10-pin motherboard connector, two 4-pin CPU lines, and two 6+2-pin graphics card leads. The internal cooling fan uses a temperature-controlled design. It suits you if you need to replace a lower-wattage Lenovo supply while adding a dedicated graphics card.
Pros
- Provides up to 310W total output across three +12V rails at 18A each
- Includes two 6+2-pin graphics card power connectors
- Temperature-controlled cooling fan activates based on CPU heat
- Supports universal AC input from 100V to 240V
Cons
- Uses a proprietary 10-pin motherboard connector rather than standard ATX
- Provides no +3.3V or +5V rail outputs in its specifications
Good fit if
- You are replacing an existing lower-wattage power supply in a compatible Lenovo desktop.
- You need dual 6+2-pin PCIe cables to power a supported dedicated graphics card.
Skip if
- You are building with a standard motherboard requiring a 24-pin ATX main plug.
- You need standard SATA power cables included on the wiring harness.
Verdict: LXun 310W Lenovo TFX Power Supply provides a tailored 310W power solution for compatible proprietary Lenovo systems. Its dual 6+2-pin connectors supply dedicated power for supported small-form-factor graphics upgrades.
Lrker 300W TFX Power Supply
Best for: HP Pavilion Slimline S5000 system replacements
- Form Factor
- TFX
- Wattage
- 300W
- Warranty
- 24-month
- Dimensions
- 3.3 × 2.5 × 6.9 inches
View on Amazon: Lrker 300W TFX Power Supply (paid link)
This Lrker unit is a 300W maximum output TFX form factor power supply designed for small form factor systems like the HP Pavilion Slimline S5000. It features a fixed cable layout with a 24-pin motherboard connector, a 4-pin CPU connector, and two SATA power plugs. It operates on 200 to 240V AC input. This unit suits you if you need a straightforward replacement for compatible desktop hardware.
Pros
- Delivers up to 300W maximum DC output
- Equipped with 24-pin, 4-pin, and two SATA connectors
- Compact TFX dimensions measuring 2.5 by 6.9 by 3.3 inches
- Includes 24 months of warranty coverage
Cons
- Requires 200V to 240V AC input and does not support 115V mains
- Provides only two SATA power connectors and no PCIe cables
Good fit if
- You are replacing the power supply in an HP Pavilion Slimline S5000 system.
- You connect to a 200V to 240V AC electrical supply.
- You only need to power a standard motherboard, CPU, and two SATA devices.
Skip if
- You operate on standard 100V to 120V household electrical grids.
- You need dedicated PCIe auxiliary power for a graphics card.
Verdict: Lrker 300W TFX Power Supply provides targeted 300W output for small form factor repairs like the HP Pavilion Slimline S5000. Verify that your electrical wall outlet supports its 200V to 240V AC input requirement before use.
SENLIFANG 380W TFX Power Supply
Best for: Proprietary 10+8 pin desktop replacements
- Form Factor
- TFX
- Wattage
- 380W
- Dimensions
- 3.94 × 3.94 × 3.94 inches
View on Amazon: SENLIFANG 380W TFX Power Supply (paid link)
This SENLIFANG unit supplies 380W of power inside standard compact TFX setups. You get a dedicated 10+8 pin configuration built for specific compatible systems including B460, P340, 510, E77, and M6600 models. The chassis measures 3.94 by 3.94 by 3.94 inches. It fits your machine if you need direct replacement power for these proprietary layouts without routing standard ATX connectors. Ensure your motherboard accepts this specific pin interface before installing.
Pros
- 380W maximum power delivery
- Compact TFX form factor
- Dedicated 10+8 pin interface for B460 and P340 chassis
Cons
- Proprietary connector limits motherboard compatibility
- No 80 PLUS efficiency rating listed
- Equal cubic dimensions differ from standard elongated TFX casings
Good fit if
- You need a 380W replacement for B460, P340, 510, E77, or M6600 hardware.
- You require a native 10+8 pin motherboard connection.
- You have a chassis fitting 3.94-inch cubic supply dimensions.
Skip if
- You use a standard 24-pin ATX motherboard.
- You require certified 80 PLUS efficiency specifications.
Verdict: SENLIFANG 380W TFX Power Supply provides 380W output for proprietary 10+8 pin systems like the B460 and P340. It serves as a direct hardware swap when you require this specialized connector layout.
SilverStone 300W Bronze TFX Power Supply
Best for: continuous-duty entry-level TFX PC builds
- Form Factor
- TFX
- Wattage
- 300W
- Efficiency Rating
- 80 PLUS Bronze
- Modularity
- Fixed Cable
- PCIe Connector Type
- PCI-E 6pin
- Fan Size
- 80mm
View on Amazon: SilverStone 300W Bronze TFX Power Supply (paid link)
This SilverStone unit delivers 300 watts of continuous power at 40°C in a standard TFX profile measuring 6.9 inches deep. It features an 80 PLUS Bronze efficiency certification and an 80mm cooling fan rated down to 18 dBA. You also get a single 6-pin PCI-E connector. It suits you if you need a low-noise replacement unit for a compact desktop running continuous workloads.
Pros
- 80 PLUS Bronze certified efficiency
- 300W continuous output at 40°C rated for 24/7 operation
- 80mm fan with minimum noise level of 18 dBA
- Equipped with a single 6-pin PCI-E connector
Cons
- Fixed cables rather than modular wiring
- Limited to 300W maximum capacity
- Provides only one 6-pin PCI-E connection
Good fit if
- You need a standard TFX power supply rated for 24/7 continuous operation at 40°C.
- You run a low-power discrete graphics card that requires one 6-pin PCI-E lead.
- You want quiet cooling with fan noise reaching as low as 18 dBA.
Skip if
- You require modular cables to reduce clutter in small enclosures.
- You operate hardware configurations requiring more than 300W of total power.
Verdict: SilverStone 300W Bronze TFX Power Supply provides continuous 24/7 output and 80 PLUS Bronze efficiency in a standard TFX chassis. It is a reliable choice if you need dedicated 6-pin PCI-E connectivity and quiet cooling for everyday systems.
S-Union 180W Lenovo Replacement TFX Power Supply
Best for: compatible Lenovo small-form-factor desktop repairs
- Form Factor
- TFX
- Wattage
- 180W
- Warranty
- 18 Months
- Dimensions
- 4 × 2 × 6 inches
View on Amazon: S-Union 180W Lenovo Replacement TFX Power Supply (paid link)
The S-Union 180W Lenovo Replacement TFX Power Supply provides dedicated power for select small-form-factor desktop systems. It delivers up to 180W of power using a proprietary 10-pin motherboard lead and a 4-pin CPU connection. With wide 100V to 240V input support and compact dimensions, this unit fits your compatible Lenovo slim tower when you need a direct hardware swap for everyday computing.
Pros
- Wide 100V to 240V input range
- Direct 10-pin and 4-pin harness for compatible Lenovo boards
- Factory tested for short circuit and voltage stability
- 18-month warranty coverage
Cons
- Low 180W maximum power capacity
- Lacks standard 24-pin ATX and PCIe power connectors
Good fit if
- You need a replacement unit for a compatible Lenovo desktop system.
- You require a power supply with a 10-pin motherboard and 4-pin CPU layout.
Skip if
- You need standard 24-pin ATX motherboard power.
- You require dedicated PCIe power cables for an add-in graphics card.
Verdict: S-Union 180W Lenovo Replacement TFX Power Supply serves as a targeted replacement for proprietary 10-pin compact systems. Its modest 180W maximum output and dedicated wiring limit it strictly to compatible low-power desktops.
Specifications side by side
| Spec | BackPlanePro 300W TFX Power Supply | Apevia 300W TFX Power Supply | Lenovo ThinkCentre 210W TFX Power Supply | SilverStone 500W Gold TFX Power Supply | Be Quiet! TFX Power 3 TFX Power Supply | MAXROB 250W TFX Power Supply | Yosoo Health Gear LCD Power Supply Tester | EBTOOLS TFX Replacement Power Supply | LXun 180W TFX Power Supply | Ciciglow 210W TFX Power Supply | LXun 310W Lenovo TFX Power Supply | Lrker 300W TFX Power Supply | SENLIFANG 380W TFX Power Supply | SilverStone 300W Bronze TFX Power Supply | S-Union 180W Lenovo Replacement TFX Power Supply |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wattage | 300W | 300W | 210W | 500W | not specified | 250W | not specified | 210W | 180W | 210W | 310W | 300W | 380W | 300W | 180W |
| Efficiency Rating | not specified | not specified | not specified | 80 PLUS Gold | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | 80 PLUS Bronze | not specified |
| Modularity | not specified | not specified | not specified | Fixed Cable | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | Fixed Cable | not specified |
| PCIe Connector Type | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | 6+2pin | not specified | not specified | PCI-E 6pin | not specified |
| Fan Size | 80mm | 80mm | not specified | 80mm | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified | 80mm | not specified |
| Warranty | One Year | not specified | not specified | not specified | not specified | not specified | not specified | not specified | 1 Year | not specified | 1 Year | 24-month | not specified | not specified | 18 Months |
| Form Factor | TFX | TFX | TFX | TFX | TFX | TFX | TFX | TFX | TFX | TFX | TFX | TFX | TFX | TFX | TFX |
| Size | not specified | TFX 300W | not specified | 500W | not specified | not specified | not specified | not specified | not specified | HK310-72PP 210W | 5.9×3.2×2.6 inches | not specified | not specified | 300W | not specified |
| Display Type | not specified | not specified | not specified | not specified | not specified | not specified | LCD Display | not specified | not specified | not specified | not specified | not specified | not specified | not specified | not specified |
| Dimensions | 6.89 × 2.56 × 3.35 inches | 6.75 × 3.23 × 2.5 inches | 1.1 × 9.7 × 6.5 inches | 6.9 × 3.4 × 2.6 inches | 6.89 × 3.35 × 2.56 inches | not specified | 3.94 × 1.97 × 0.79 inches | not specified | 5.91 × 3.23 × 2.72 inches | not specified | 5.9 × 3.2 × 2.6 inches | 3.3 × 2.5 × 6.9 inches | 3.94 × 3.94 × 3.94 inches | 6.9 × 3.4 × 2.6 inches | 4 × 2 × 6 inches |
| Weight | 3 pounds | 2.1 pounds | not specified | not specified | 3.09 pounds | not specified | 2.82 ounces | not specified | 1.98 pounds | not specified | 1.79 pounds | not specified | not specified | 3 pounds | not specified |
| Color | Grey | Black | not specified | black (lead-free paint) | Black | not specified | Black | HK310 72PP 210W | not specified | not specified | not specified | not specified | not specified | black (lead-free paint) | not specified |
| Model | LYSB00CXAUQJK-CMPTRACCS | TFX-AP300W | 7823903000 | SST-TX500-G | BN323 | FSP250-50SAV(PF) TFX 250W | not specified | not specified | HK280-72PP, 54Y8971, PA-2181-2 | ciciglowx0n2w6zfre-13 | PCJ007 SP50H29573 | 9053 | not specified | SST-TX300 | HK280-72PP |
Is a TFX power supply worth it?
A TFX power supply fits narrow desktop cases where standard ATX units cannot physically mount. Standard TFX dimensions run roughly 2.6 inches high, 3.4 inches wide, and 6.9 inches long. In daily operation, this compact layout accommodates low-power systems with capacities between 180W and 500W. Units often integrate an 80mm cooling fan to circulate air through cramped enclosures. Choosing TFX gives you exact mounting alignment inside slim MicroATX chassis and low-profile office towers.
Worth it if
- You maintain a slim MicroATX or prebuilt office chassis requiring an elongated 2.6 by 3.4-inch mounting profile.
- You need a dedicated replacement unit delivering between 180W and 500W for low-draw desktop components.
Skip it if
- You build inside a standard case with clearance for standard ATX power supplies.
- You require continuous power capacity exceeding 500W for high-demand hardware setups.
If you plan to use a larger enclosure, verify mounting dimensions and power supply clearance when choosing a PC case with RGB.
How We Picked TFX Power Supplies
To find options for this guide, we identified units with the TFX form factor listed in their product title or feature specifications. Only one model variant per product family appears in this list of 15 selections for 2026. We rely entirely on published manufacturer specifications and technical data sheets, without physically handling any units.
We evaluate published specifications such as continuous wattage output, physical dimensions, and efficiency certifications to help you compare units for compact chassis builds. On this page, products in stock appear first so you can view currently available hardware immediately.
How to Choose a TFX Power Supply
-
Check AC Input Voltage Range
Check the supported wall voltage before you choose a replacement power supply. Certain models accept standard universal inputs from 100V to 240V, which work in any region. Other units operate within strict electrical ranges. For instance, the Lrker 300W TFX Power Supply requires a dedicated 200V to 240V AC input. Connecting a narrow-range unit to an incompatible outlet leads to failure. Always examine the voltage label on your existing chassis to ensure the new supply functions properly on your local electrical supply.
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Match Motherboard Connector Pin Configurations
Small-form-factor prebuilt desktop boards often skip the standard 24-pin connector in favor of proprietary interfaces. You must verify whether your motherboard requires standard wiring or a specialized pin configuration before purchasing. Some compact desktop systems use a 10-pin connection, while units like the SENLIFANG 380W TFX Power Supply supply a specialized 10+8 pin interface. Installing a standard ATX harness into a system with proprietary pinouts will not work. Match the pin counts of your existing system cables precisely to ensure proper board power.
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Verify Auxiliary PCI Express Connectors
Basic small-form-factor office computers rely purely on motherboard slot power, but adding a dedicated graphics card requires auxiliary connectors. Review the cable specifications to determine if the power supply includes external card leads. The LXun 310W Lenovo TFX Power Supply provides dual 6+2-pin connectors to power compatible discrete graphics cards. Choosing a unit that lacks dedicated PCI-E connectors forces you to run lower-power components. Match the wattage and auxiliary connector configuration to your card requirements before selecting a replacement unit.
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Confirm Exact Outer Case Dimensions
While TFX represents a defined form factor, physical dimensions can vary significantly between models designed for specific slim cases. Standard units measure roughly 6.9 inches long, but shallower enclosures require shorter housings. For example, the LXun 180W TFX Power Supply features a compact 5.91-inch length alongside a 3.23-inch width and 2.72-inch height. Measure the clearance inside your chassis before ordering. Selecting a supply that exceeds your chassis depth prevents the mounting screws from aligning or blocks adjacent internal drive brackets.
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Test Voltage Outputs Before Assembly
Validating line voltages prior to installing a replacement power supply prevents damage to sensitive computer components. If you perform frequent hardware repairs or maintenance swaps, consider keeping a dedicated diagnostic tool in your setup. The Yosoo Health Gear LCD Power Supply Tester checks TFX and ATX voltage rails directly. Its built-in LCD screen provides real-time voltage readings, and warning buzzers signal irregularities immediately. Testing the output rails before routing internal cabling confirms the unit delivers proper power safely to your system.
Frequently asked questions
Can a TFX power supply support a dedicated graphics card?
Yes, you can run a dedicated graphics card if the power supply includes PCIe power connectors and sufficient capacity. For instance, the LXun 310W provides dual 6+2-pin connectors for graphics upgrades, while the SilverStone 300W Bronze includes a dedicated 6-pin lead. Many lower-wattage models supply under 250W without supplementary GPU cables, restricting your system to basic integrated graphics.
What is the difference between standard and proprietary TFX power supplies?
Standard TFX units utilize conventional 24-pin motherboard wiring, while proprietary designs use specialized pin layouts. Prebuilt office computers often demand non-standard connections. For example, units like the EBTOOLS HK310 or Ciciglow 210W feature dedicated 10-pin connections, and the SENLIFANG 380W uses a 10+8 pin configuration. You must match the connector layout directly to your motherboard socket before swapping hardware.
How do you verify if a TFX power supply is working properly?
You can diagnose unit health using a dedicated testing device before installing components inside your case. Diagnostic tools such as the Yosoo Health Gear LCD Power Supply Tester read out voltage rails across standard leads and sound warning buzzers if voltages fall outside tolerance. This bench check confirms your supply delivers clean operational power before connecting sensitive motherboard hardware.
Can you use an SFX power supply in place of a TFX unit?
No, you cannot directly mount an SFX unit in a native TFX chassis slot. TFX power supplies use a distinct long, narrow profile designed for slim enclosures, measuring approximately 2.6 inches high and 3.4 inches wide. SFX power supplies feature wider, squarer dimensions and different mounting screw locations, meaning they will not align with your slim case bracket without custom fabrication.
What cooling fan size is typical for a TFX power supply?
Most TFX units rely on an internal 80mm cooling fan mounted along the casing. Models like the Apevia 300W and SilverStone TX500 utilize 80mm fans to push airflow across dense internal components within narrow enclosures. Because the chassis width restricts fan diameter, quality units depend on thermal-controlled fan profiles to maintain manageable acoustics while exhausting heat out the rear.
How much wattage do you need for a TFX PC build?
Your component draw dictates the required wattage for small desktop chassis. Typical replacement office systems require between 180W and 250W, matching factory units like the LXun 180W or MAXROB 250W. If you plan to run higher-load processors or discrete low-profile add-in boards, target units delivering 300W to 500W to provide stable headroom under load.
What does active PFC provide in a TFX power supply?
Active Power Factor Correction (active PFC) regulates input current to match the AC voltage waveform, increasing overall electrical efficiency. In compact units like the BackPlanePro 300W, active PFC automatically adjusts for fluctuating line voltages and reduces harmonic distortion on your circuit. This technical feature ensures cleaner power delivery and prevents energy waste during continuous desktop operation.