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The original was posted on /r/overclocking by /u/kscERhau on 2023-08-08 10:56:12+00:00.

Hi people

Have been doing some overclocking on my CPU (i9 13900kf) and 4090FE. Since upping the GPU OC the benchmarks have revealed that the 990 Pro is underperforming, at least at half speed. I’ve removed the GPU OC and reran tests but the performance hit is still there. I’ve checked, it’s in a PCIE Gen4 slot, and it’s health in Samsung Magician is OK. Firmware is up to date on the M2 and bios etc. Any ideas what I am doing wrong? Prior to this the M2 was fine. Temperatures seem fine, not going above 55C on the M2