Hey, all!
I have an HP Z400 and I want to install a non-proprietary PSU inside, however, because HP has changed the motherboard + PSU layout, there are no alternative PSU's that you can buy that will work with the Z400... Unless a little tinkering is done...
Above is the pin layout of a standard ATX PSU, and an HP Z400 PSU. What I have circled are the 3 different pins that HP has changed to stay proprietary. If I were to power on an HP Z400 mobo with a standard ATX PSU, either the system would be fried, or the motherboard would not P.O.S.T. That means that I have to get a Standard ATX PSU, and change the pin layout, so that it is the same as the Z400 pin layout (or buy some third party PSU from China, but I won't do that...)
The problem...
You can see that the Z400 has an extra ground and 2 extra +12v pin, that a standard PSU does not have. Pins 12, 20, and 23 were changed from HP to make the system have a proprietary power delivery.
The question...
How would I add another ground pin, as well as 2 +12V pins? Would it be as simple as splicing a separate +12V and Ground, or would that possibly cause damage to the board/PSU for not sending/receiving enough power. Will the standard ATX PSU have 2 spare +12V and Ground pins inside the PSU? Also, on the Standard ATX PSU, there is a -5v on pin 20. Does the PSU care whether that is in use or not?
If you know the answer, and can help, i'd really appreciate this. The Z400 PSU is really shitty (less than 500W) and is quite loud.
Note: I know this will void the warranty of the PSU, Mobo, and whatever else is involved. I don't care.