Question PC Crashes with XMP Enabled After Mixing Monitor & PSU Power Cables—Help Needed!

Nov 23, 2024
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Hi everyone,

I’m experiencing crashes with my PC, specifically when enabling the XMP profile for my RAM. The crashes happen almost immediately when I try to game. With XMP disabled, the system seems stable, even during gaming and stress testing. Here’s the context, my full specs, and what I’ve tried so far:

PC Specs:
CPU: Intel Core i5-12400F
CPU Cooler: ARCTIC Freezer 34 eSports DUO
Motherboard: Gigabyte B660M DS3H DDR4
RAM: Corsair Vengeance LPX 32GB (2 x 16GB, DDR4-3200, CL18)
GPU: Zotac GAMING Twin Edge OC GeForce RTX 3060 Ti LHR (8GB)
PSU: NZXT C650 (2022, 650W, 80+ Gold Certified, Fully Modular)
Case: be quiet! Pure Base 500DX

My PC was working perfectly for over a year.
Recently, I had to disconnect all my cables to move my desk. After reconnecting everything, I might've accidentally swapped the power cords for the monitor and PSU (both use C13 connectors and look identical and are rated 10A 250V).
The PC powered on for about 30 seconds with the wrong cable, restarted once, and then I realized the mix-up and shut it down to swap the cables.
After that, I noticed the system would not boot. There was also a red light on the motherboard moving from DRAM to CPU. The PC would be on with the RPG lights and everything spinning, but no display. I managed to boot the PC by moving the two RAM slots from 2nd/4th to 1st/3rd position. It appears to work now, but only with XMP disabled. If I enable XMP and I try to game, PC crashes almost instantly. Sometimes it freezes and kicks me out to the window screen, other times I see the blue error page with the sad face for a split second before the PC reboots.

I would like to clarify that I had no issues with this system before. It only occurred after I plugged everything back together and in my own stupidity managed to mix up the cables which I believe may have fried some of the components.

Question:
Could using the monitor cable on the PSU for 30 seconds have damaged my PSU or other components, even if voltages seem stable?

I don't have any spare parts, however I would appreciate any feedback or recommendations of what I could try to hopefully identify the culprit.

Thanks,
Adds