Questions about using the N70-130 Motherboard with a third party PSU

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physicsme
physicsme Member Posts: 1 New User

I got an N70-130 motherboard from used market, tried to power it with an off the shell 24pin ATX PSU and a 24pin to 6pin adapter specific to acer's pinout. It kind of worked.

Aside from 12V and GND, the adapter just shorts PS-On to GND which makes the PSU permanently on.

I could power on the system, get into OS, play games and have all the peripherals working. But there are problems:

  1. even when the system is completely shut down, it still draws ~17W. And the CPU fan still spins and the GPU stays warm.
  2. If I pull the plug at the previously mentioned "system shutdown but still draws power" state, when I plug it back in and power on again, it says "CMOS checksum error or CMOS battery loss" and all bios settings reverts to default.

I wonder it these problems are because of the janky PSU cable adapter or signs of a faulty motherboard or other issues. Is there a way to find out without acquiring an "original" PSU?

Looking at photos of Acer PSUs online I see they are labeled as "switching power supply". But the 6 pin connector doesn't seem to distinguish between switching 12V and standby 12V.

I've read posts like this :

which confirms the adapter I used got the right pinout but it doesn't solve the problems I have.