Can I swap my HP Prodesk 400 G5 mt power supply for a regular ATX supply?

F5F Stay Refreshed Hardware Desktop Can I swap my HP Prodesk 400 G5 mt power supply for a regular ATX supply?

Can I swap my HP Prodesk 400 G5 mt power supply for a regular ATX supply?

Can I swap my HP Prodesk 400 G5 mt power supply for a regular ATX supply?

R

RoMoCo510
Junior Member

10

05-07-2025, 03:00 PM

#1

Hi,
My HP Prodesk pc stops working unexpectedly during gaming or when under heavy use. I believe the issue lies with the power supply. I removed the supply and tried connecting the green and black wires from the 3rd connector, which restored power, but a strange noise came from the transformer. The HP power supply has three connectors: two 4-pin ones for the CPU and hard drives, and one third connector with a grey wire that only outputs 9.97V.

Could this grey wire have originally been 10V? Should I replace it with an ATX power supply? Thanks for your advice.

R

RoMoCo510

05-07-2025, 03:00 PM #1

Hi,
My HP Prodesk pc stops working unexpectedly during gaming or when under heavy use. I believe the issue lies with the power supply. I removed the supply and tried connecting the green and black wires from the 3rd connector, which restored power, but a strange noise came from the transformer. The HP power supply has three connectors: two 4-pin ones for the CPU and hard drives, and one third connector with a grey wire that only outputs 9.97V.

Could this grey wire have originally been 10V? Should I replace it with an ATX power supply? Thanks for your advice.

A

abeniman
Junior Member

15

05-07-2025, 03:38 PM

#2

No, since it's a proprietary product. The motherboard and case are also proprietary and won't fit with ATX parts. If you need an ATX power supply, you'll have to replace the case and motherboard as well.

A

abeniman

05-07-2025, 03:38 PM #2

No, since it's a proprietary product. The motherboard and case are also proprietary and won't fit with ATX parts. If you need an ATX power supply, you'll have to replace the case and motherboard as well.

O

Okwrighty
Member

105

05-10-2025, 03:50 AM

#3

It did function in some way. I tried to understand how this unusual Stock power supply operates. Normally, the ATX supply only has the +5VSB in the motherboard, which lights the LED indicator. But with HP systems, if it's not plugged in (not in ON mode), the supply already gives 12V to the board. I don't know why, but even the fan from the power supply didn't spin. So I connected the Green and Black wires of the 24-pin ATX, which should ensure 12V reaches the board even when it's not turned on. The system is now working properly, though I'm still concerned about potential problems. Thanks.

O

Okwrighty

05-10-2025, 03:50 AM #3

It did function in some way. I tried to understand how this unusual Stock power supply operates. Normally, the ATX supply only has the +5VSB in the motherboard, which lights the LED indicator. But with HP systems, if it's not plugged in (not in ON mode), the supply already gives 12V to the board. I don't know why, but even the fan from the power supply didn't spin. So I connected the Green and Black wires of the 24-pin ATX, which should ensure 12V reaches the board even when it's not turned on. The system is now working properly, though I'm still concerned about potential problems. Thanks.