u/Freecksed

▲ 2 r/pcbuilding+1 crossposts

New PC runs fine for casual use but turns off after 10-15m of testing on games

When it turns off, the fans keep spinning and my motherboard light turns on (amber). Same result on CS2 and Valorant both tested with a frame cap and low settings. Crashes occurred at normal CPU/GPU temps <60C.
Tried using one stick on slot A2, then the other stick on that same slot to check for a faulty stick but same result.
Got red light at one point so did CMOS reset, no EXPO enabled.
GPU fan still spinning after crashes.
Tried to replicate with just YouTube videos but couldn't.

Motherboard installed on the central standoff of my case that came with it.

Noticed that the CPU Cooler fan sits right above A2 RAM slot. That RAM slot has been found loose and not seated correctly once after CMOS reset.

It's my first build and I don't want to send it to a repair shop, all help appreciated!

Specs list:

CPU: AMD Ryzen 7 7800X3D 4.2 GHz 8-Core Processor

CPU Cooler: Thermalright Phantom Spirit 120 SE 66.17 CFM

Motherboard: MSI B650 GAMING PLUS WIFI ATX AM5 Motherboard

RAM: Crucial Pro Overclocking 32 GB (2 x 16 GB) DDR5-6000 CL36 Memory

SSD: Western Digital WD_Black SN850X 2 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive

GPU: MSI Radeon RX 6700 XT 12G Radeon RX 6700 XT 12 GB Video Card

PSU: Corsair RM850e (2025) 850 W Fully Modular ATX Power Supply

Case: Fractal Design North ATX Mid Tower Case

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u/Freecksed — 10 days ago