Running Cinebench causes a reduction in clock speed at 8700k.
Running Cinebench causes a reduction in clock speed at 8700k.
Have you confirmed the reset process and checked the behavior during idle mode?
It seems you're wondering if turning off the "Multi-core Enhancement" might be causing performance issues. Some users report that disabling it can lead to better CPU performance with fewer cores, but once more cores are needed, the boost reduces. This could explain why your CPU drops to lower speeds under heavy load.
I just performed that action—it does the same, no turbo boost. It wasn’t enhanced, it was just off. I tried everything, and it seems like it’s cursed. Sometimes it drops below 3.7, but usually it holds around 4.
I tested it recently and the issue remains unchanged. I used the CPU core ration in fixed mode, which should disable it automatically, yet the same problem occurred in both cases.
Thanks for the assistance initially. I finally identified the issue—my motherboard's power draw settings are quite obscure. When set to auto, it caps the CPU at 95W, which causes it to downclock over time to hit the desired 3.5GHz. This is useful info for troubleshooting and for others facing similar problems.
Open the BIOS and adjust the PL1 and PL2 turbo limits to maximum values to avoid power throttling. Some boards include an Unlimited option that sets both limits to 4095W; I chose 300W for the same effect. Try not to restart a system that's been running for four years. It's better to begin a fresh thread than to revisit a stalled conversation.