PC crash when gaming after CPU upgrade
Hello!
I have upgraded my CPU today from a Ryzen 2600 to a Ryzen 5950x. The PC boots, everything works, I can even run a CPU and GPU benchmark simultaneously, but as soon as I run a demanding game for a minute or so, my PC crashes. The screen goes black, the PC lights stay on and the CPU debug LED of my mainboard is on. At this point I cannot even hard shutdown the PC by holding the power button, I have to switch off the power supply, switch it back on, then boot.
I have updated the BIOS, have cleared CMOS (at least I think I have, I switched the power supply off and pushed the reset CMOS button on the back). Nothing helped so far. I don't think it's a power supply issue, as I looked up the recommended power supply wattage for my setup and it's 600W upwards, I have 750W.
I'm running OpenSUSE Tumbleweed on this PC.
These are my hardware specs:
CPU: AMD Ryzen 5950x
Mainboard: MSI B450 Gaming Pro Carbon AC
RAM: 2x HMA82GU7CJR8N-VK
GPU: AMD RX 7800 XT
Drives: ADATA NVME SSD, 2 TB, SX8200PNP; Western Digital HDD, 2 TB, WDC WD20ERFX; ADATA SSD, 512 GB, SU800 (system drive); LG DVD burner, GH24NSD1.AUAA10B
PSU: Be quiet! System Power 11 750W
Thank you for reading! Any help would be really appreciated.