Nitro N50-640 Replacement PSU (Corsair RM650) Keeps Powering Fans & USB ports after shutdown

Vingy
Vingy Member Posts: 1 New User
edited January 14 in Nitro Gaming

All,

I have replaced the PSU in my sons N50-640 with a Corsair RM650 using a 24 to 6 pin adapter for the mobo and the other standard 8 pin PSU connected for the 12v. It all runs and works well. however when you turn it off, the computer dies down but the case fan keeps running and there is power still to the USB's so everything he has plugged in like speakers and USB charger etc… stay powered.

What am I missing? how do I fix this?

Answers

  • StevenGen
    StevenGen ACE Posts: 13,333 Trailblazer

    Those 24 to 6 pin adapter cables is where the problem is, as these Acer proprietary mainboard and PSU desktops are not meant to be upgraded with a 24 pin PSU. You need to study the 24 pin to the 6 pin orientation of the mainboard and PSU 24 pins and orient the new PSU to supply voltage the same way in the same pin numbers like below to the board. I can only give you the oem pins of these plugs as documented by Acer for the N50-640 desktop, hope that helps you out. Good luck.

    This is the plugs tat you need to check on the N50-640

    If this answers your question and solved your query please "Click on Yes" or "Click on Like" if you find my answer useful👍

  • freddy3366
    freddy3366 Member Posts: 4 New User

    It sounds like the motherboard might not be fully shutting down when you power off the PC, which can happen if the 5V standby power from the PSU is still active. The Corsair RM650 could be providing power to certain components (like USB ports) even when the system is off.

    To fix this, try the following:

    1. Check if the "ErP" or "Power On" setting is enabled in your BIOS/UEFI. Enabling "ErP" (Energy-related Products) will cut off standby power to USB ports when the PC is off.
    2. Double-check the connections to ensure everything is wired correctly, especially the 24-pin and 8-pin cables.
    3. If the issue persists, you could also try a different PSU or adapter to see if it's related to how the Corsair PSU handles power in standby mode.

    Hope this helps!