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Replace Power 420 Watt Mini ITX / TFX Power Supply

MPN: TFX-Power-Supply-420W | SKU: WR4972
Regular Price: $49.78
Price: $25.98
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  • 420 Watts to give you the power you need
  • Supports standard TFX form factor
  • High efficiency
  • Fixed cables
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Frequently Bought With

  • Key Selling Points

Key Selling Points

  • 420 Watts to give you the power you need
  • Supports standard TFX form factor
  • High efficiency
  • Fixed cables
  • Description
  • Product Details
  • Customer Reviews
  • Q&A


This Replace Power 420W replacement TFX Power Supply features a 20+4 Pin PSU connector and gives you the power you need to get your system up and running. The TFX power supply format is designed for small form factor (SFF) cases that are commonly built into smaller systems or PCs. This power supply will replace your existing TFX unit or upgrade your power if you're looking to install a new hardware component. Single rail design ensures high performance over time and quiet operation makes a great choice for use in a system that is where you live.

The Replace Power TFX 420W offers advanced power in a compact design. This PSU gives you more juice for your mini or media PC. It is the perfect upgrade or replacement for any PC chassis requiring a TFX form factor PSU. Designed for higher efficiency while providing solid voltages and power to your TFX form factor system.

  • Single Rail EPS12v
  • 20+4 Pin Main Power Connector
  • 4+pin CPU Connector
  • Sturdy 0.6mm SECC Case
  • Works with both 20 and 24 main connectors
  • Popular replacement for the Dell Inspiron 546S
AC Input Voltage / Current
110/220V; 47-63GHz
DC Output
+5V/12A; +12V/14A; -12V/0.5A; +3.3V/12A +5VSB/1.5A
Case Material
0.6mm SECC
Fan Size
Rated Power
Max Power
1 x 20+4 pin Main Connector
1 x 4-pin P4 CPU Power Connector
2 x SATA
2 x 4-Pin Molex
  • Dimensions: 6.75 Inch; Height 3.25 Inch; Width x 2.5 Inch
  • Replace Power® PSU
  • Type: TFX
  • Supports Slimline and SFF models
  • Upgrade to 420 Watts. Replaces your 200, 250, 300 or 350 Watt power supply.


  • 1 x Replace Power RP-TFX-420 TFX 12V 20+4-pin 420W Power Supply

Brand: Replace Power

MPN: TFX-Power-Supply-420W

UPC: 813036029941

Compatibility: TFX Form Factor, Molex, SATA

Packaging: Retail

Condition: New

Product Details

Replace Power

Package Includes

Customer Reviews

Review Summary
85.71% (12)
14.29% (2)
0.0% (0)
0.0% (0)
0.0% (0)
By Joe
Excellent Transaction
Product was shipped in a very timely manner, communication excellent. Product was exactly as advertised and worked perfectly
Optiplex 7010 DT
Perfect replacement for my Dell optiplex 7010 Desktop model computer. Works great.
By dan
works with lenovo 510a
I could'nt get any info on what kind of power supply to get to upgrade my Lenovo 510a to install a better gpu and this one works for anyone wondering.
By ryan
my computer works again
fits perfectly in my hp pavilion slimline. the fan is a bit loud but at least it works and has way more power than the stock unit.
By Ken
Works Great, enough power to add on now
My computer only came with 180w power supply. This was a exact fit for the small mini tower.
By James W Turnipseed
Works great
It was a tight fit in my case. Had to make a couple of modifications to my caseThe fan makes more noise than my original but over all works great.
By "Josué"
It is working good. =)
It is working good. Thanks a lot!
By Jeff
The perfect part
It fit right in. No stress. Love it.
By Emmett Benson
Power supply
it is working just fine
By Herm
Replacement Power Supply
Ppwer Supply was as discribed and unique to fit my Dell PC. It was easy to install and is working without any problems.


Question & Answers
By OutletPC Shopper on 2016-05-25
will this fit in dell inspiron 580s

By Customer Service on 2016-05-25

Thank you for your inquiry. The ReplacePower 400 Watt TFX Power Supply is a compatible replacement or upgrade for the power supply that comes with the Dell Inspiron 580S.

By OutletPC Shopper on 2018-06-22
Will this work on a Dell i3668

By Customer Service on 2018-06-25

Unfortunately, this will not be compatible with the i3668

By OutletPC Shopper on 2016-06-02
is this 80+? Also, is the fan loud? i've read some other descriptions that this is a passive fan.

By Customer Service on 2016-06-02

Hee, This is not 80+ rated. The fan is not loud but it is an active fan.

By OutletPC Shopper on 2016-10-29
Will this fit in a rosewill case r379-m

By Customer Service on 2016-10-30

As this power supply is meant for pre-built systems, it is tough to say if this will fit. However, given the mounting holes on the supply, chances are likely this may not as the case itself comes with a power supply. It is best to contact the manufacturer regarding this.

By OutletPC Shopper on 2017-04-11
could I make this fit in a dell 7010 DT.

By Customer Service on 2017-04-12

The dimensions should work for the 7010 DT. You may want to check to ensure the connectors will match for all parts inside the 7010 DT.

By OutletPC Shopper on 2017-02-07
Will this fit and work with a dell 530s slim case?

By Customer Service on 2017-02-08

Marshall, Yes this should fit.

By OutletPC Shopper on 2017-04-30
Hello, Will work with a micro ATX motherboard that requires 1 x 24-pin ATX main power connector 1 x 8-pin ATX 12V power connector

By Customer Service on 2017-04-30

No, this power supply will not work as this power supply only has a 4 pin ATX connector, not an 8 pin.

By OutletPC Shopper on 2017-02-13
Will this power supply work with a HP Pavilion a305w

By Customer Service on 2017-02-19

Unfortunately, this power supply would not be compatible as A305W requires a different format power supply and the mounting holes will not line up.

By OutletPC Shopper on 2014-11-17
I would like the physical dimension of this product, I am trying to replace a HP pavilion slim line 7700e and need to know if this will fit the space that is there.

By Customer Service on 2014-11-18

The dimensions of this power supply are as follows: Depth: 6.75 Inch; Height 3.25 Inch; Width x 2.5 Inch

By OutletPC Shopper on 2017-05-14
will this fit in my dell optiplex 580 desktop computer?

By Customer Service on 2017-05-15

No, this would not be compatible for a Dell Optiplex 580.

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Replace Power 420 Watt Mini ITX / TFX Power Supply

Price: $25.98
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