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mac pro power supply conversion questions

S

ShikikanZero

n00b
Joined
Aug 1, 2009
Messages
15
alright so im working on a mac pro power supply conversion, had it all wired up tonight, and connected it to my test board (a dead striker extreme) and it does get power, but it seems like something is wrong as the post screen in the back flickers. i cant remember if it always did that and i really dont want to test this in my working system, so i look at the only problem that there might be in this setup, what i was doing with the 5v lines:

7.jpg


the way i have it setup is that the 12v lines are connected to the 12v v1 rail, and the eps12v connector is on the v2 rail. the 5 5v lines are split into 2 groups, one with 2 5v lines and the 5vsb line, and one with 3 5v lines and the pwr_ok line (mac pro psu doesnt have a pwr_ok line so im bypassing it that way. the group with the 5vsb line is connected to a line from the psu that is still feeding 5v before powerup. the grounds are all randomly connected to the rest of the open grounds on plugs 2 and 4. note how i only have 2 5v wires to choose from (the third is going to power drives.)

PuitF.png


is there anything that im missing? im going to try and bring out the voltmeter and test every wire tomorrow but just wanted to see everyone elses opinions? thanks!
 
so i tested all lines on the power supply and found that all voltages are within their range, but the strange thing is that all voltages are live even before the pwr_on signal is shorted. so when i tried hooking up a 5v line to the standby 5v line on the motherboard and nothing else the board power up fine (no flashing post lcd). does anyone know a way around this?
 
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