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ATX testing power supply?

post #1 of 6
Thread Starter 
I'm working on modding some LED case fans and was wondering if its possible to mod an ATX power supply into a bench test power supply unit (running the power supply without connecting to a MB). I've found a tutorial on using an AT power supply but I have an old ATX power supply from a previous build that I'd like to use if possible.
post #2 of 6
You can turn a power supply on simply by jumping the green wire in the 24-pin connector (PS_ON) with a ground wire. However, be aware that group regulated power supplies require at least some load on the +5V and +3.3V in order for voltage to remain in spec. The majority of power supplies (though not all) under $100 are group regulated.
post #3 of 6
Thread Starter 
Can I rig up a dummy load? If so how? (Use some resistors in-line?) Or do I have to connect some hardware? I've got some POS fans and a couple dead hard drives (they will power up but can't read data).
Edited by Philistine - 3/18/11 at 12:20am
post #4 of 6
Resistors will work. A few 1ohm resistors would be perfect.
post #5 of 6
Thread Starter 
Thanks!
post #6 of 6
This is a good idea I have an old P3 300W supply that would be great for this.
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Eclipse
(16 items)
 
  
CPUMotherboardGraphicsRAM
Core i7 4790K ASRock Z97 Extreme4 Sapphire Radeon RX480 Nitro OC 32GB Gskill 2133 DDR3 
Hard DriveHard DriveHard DriveOptical Drive
Samsung 850 EVO 250GB Toshiba P300 1TB 7200RPM WD Blue 3TB Samsung Dual Layer DVD-RW 
CoolingOSMonitorKeyboard
Hyper 212+ Push Pull Windows 7 Ultimate X64 Samsung 23" 1080P MS Wireless Keyboard 4000 
PowerCaseMouseMouse Pad
Corsair HX 650W Rosewill Blackhawk MS Wireless Laser Mouse 5000 Steel Series 
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