Question Sudden GPU load and power consumption drops during benchmarking/playing games


May 10, 2021
MSI Z490 MPG Gaming Plus
i7 10700K @3.8 GHz
2x16 GB Crucial Ballistix 3600 CL16
2x1 TB Samsung Evo 860 SATA SSD
Gigabyte RTX 3080 Ti Gaming
be quiet! Straight Power 11 850W Gold

My FPS drops while playing or benchmarking without any reason, Happens randomly. GPU load and power consumption drops significantly: from 100% to 30-10%, 300W to 100W accordingly. No thermal throttling from GPU and CPU. No bottleneck from CPU either. RAM load doesn't go up too. Checked CPU with Intel diagnosis tool - everything seems ok. Checked RAM with memtest64 for 5 hours - no problems too. Checked both SSDs with Samsung diagnosis tool - they're fine. Tried to replace my new RTX 3080 Ti with my old GTX 1080 - problem still persist. Replaced my old 750W PSU from same manufacturer to 850W - didn't helped. Reinstalled Windows - didn't helped too.

Everything started 3 month ago. I launched MSI OC scanner in MSI Afterburner and my PC restarted.
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