Fuel Hack: ATX PSU Converter/Adapter - in stock

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Fuel Hack: ATX PSU Converter/Adapter - in stock

Unread postby kubatyszko » Sat Sep 23, 2017 4:56 pm

ATX Fuel PSU Converter board / adapter

The adapters are usually available for $82 on eBay, Tindie and directly via forum (price for members is $75).

As of October 5th 2017 - I have 5 in stock ready for shipment.

Link to installation manual: http://kubatyszko.com/filez/atxfuel_manual.pdf

There’s a long story behind those adapters, it started with a Fuel that I bought from Hamei, after shipping it from China to Japan the PSU died and I was left with no choice but to come up with a solution.

Incidentally, Pontus had a similar problem and solved it with home-made adapter: http://forums.nekochan.net/viewtopic.php?f=3&t=16725574&start=15#p7342717

I did some work and built a similar one, with a very important additional feature added - generator of the Fan PSU signal (since ATX PSU do not usually provide RPM reading).

My first adapter looked like this: Image (this is hot linked to my original post),

then time came for the second iteration with FAN signal: http://forums.nekochan.net/viewtopic.php?f=3&t=16725574&start=60#p7348338

The PSU I decided to use is RockPower LW-6550HG with 550W capacity and: 3v3=35A, 5V=40A, 12V1=16A, 12V2=18A, -12=0.8A and 5VSB=2A

Those specs exceed Fuel’s NMB PSU specs in most cases.

The absolute minium specs your ATX PSU needs to meet are:

+3.3V 27.0A
+5V 27.0A
+12V I/O 15.0A
+12V CPU 15.0A
+5Vsb 2.0A
-12V 0.6A

There is a TINY leeway in the 5Vsb and -12V - those are used for standby power and serial port.
Also, if you don't have a ton of HDD's in your Fuel, you can go a tad lower with 5V and 12V I/O - say 24A and 12-13A.

If you’re curious what happens when you use PSU that’s too weak:


I’ve ran my Fuel successfully with 400W PSU but the operation wasn’t too stable and L1 was very busy with warnings…


There are 4 revisions of the adapters available:

Rev0 (hand-modified wire harness):

Never sold publicly, I have one or two at home, and I think I gave one to Hamei as a present.

Rev1 (purple PCB, prototype with a lot of added solder over traces, Both ATX Plug and sockets on the underside):



Rev2 (blue PCB, with solder added and ATX side socket on the top, the picture was shot before adding solder and 3 jumper wires):



Rev3 (red PCB, with no solder required), features identical with Rev2, actively manufactured and sold):


Revisions 2 and 3 provide a few additional features:

  • TWO status LED’s -

    right (usually yellow) is for Standby power - shows that the ATX PSU receives mains voltage
    left (usually green) - on when the ATX PSU is in operation
  • TWO on-board generated Fan PSU signal (both provide 1800-2000 RPM - far above minimum threshold for any fan), one is meant to be fed as PSU Fan signal via included jumper, another is up to you - in case you replace another fan with one that’s below the threshold you have the option to feed the generated signal to keep the env monitoring happy.
  • Kickstart button - an option to force the ATX PSU to start (in case Fuel refuses), this helps with troubleshooting, you may be able to force the Fuel to start and at least get some L1 information out to help you find out what’s broken


List of verified known-to-work PSU’s:

  • RockPower LW-6550HG
  • AQTIS 600W AP-600GR
  • Sparkle FSP460-60PFN ** - those numbers are for the WTX (Fuel) version, one would have to look up the ATX equivalent
  • NMB GM430WTXW01SSV (SGI PN SG002A430WSW) - those numbers are for the WTX (Fuel) version, one would have to look up the ATX equivalent
  • Fortron fsp460-60pfn - this might be the Sparkle's ATX version
  • Seasonic SS-500ET-F3

List of PSU’s mentioned by members but not confirmed:

  • Hantol ATX 585W [HPSU585P]
  • Corsair CX600
Last edited by kubatyszko on Sat Oct 07, 2017 9:39 am, edited 9 times in total.
Designer of Fuel ATX PSU adapter board : viewtopic.php?f=3&t=16732341
(now ships from USA), In stock!

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Joined: Thu Aug 15, 2013 6:22 am
Location: Aberdeen, Scotland, UK

Re: Fuel Hack: ATX PSU Converter/Adapter

Unread postby Trippynet » Sun Sep 24, 2017 2:21 am

Top post! Would be good to add a reference to this in the Wiki as well IMO.
Systems in use:
:Indigo2IMP: - Nitrogen: R10000 195MHz CPU, 384MB RAM, SolidIMPACT Graphics, 36GB 15k HDD & 300GB 10k HDD, 100Mb/s NIC, New/quiet fans, IRIX 6.5.22
:Fuel: - Lithium: R14000 600MHz CPU, 4GB RAM, V10 Graphics, 72GB 15k HDD & 300GB 10k HDD, 1Gb/s NIC, New/quiet fans, IRIX 6.5.30
Other system in storage: :O2: R5000 200MHz, 224MB RAM, 72GB 15k HDD, PSU fan mod, IRIX 6.5.30

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