Running Cinebench causes a reduction in clock speed at 8700k.
Running Cinebench causes a reduction in clock speed at 8700k.
8700k msi z370 a-pr model downclocks from 4.9ghz to 3.6ghz just before completing cinebench. All cores overclocked at 4.9ghz in fixed mode. Voltage line stays tight with minimal drop. Intel turbo boost turned off, AVX offset set to 0. No VRM throttling detected. CPU temps remain under 80°C. Everything worked smoothly after adjusting voltage and current protection settings.
Your power management is configured to wait for a need before applying changes, so ensure you're in performance mode. The balanced option won't activate optimization until required.
I’d consider reducing the load line (it sometimes works for me). Did you also unlock the power settings for the CPU? Just turning them off for your VRM won’t disable them for you.
It seems related to managing system resources, likely involving Windows settings. The load is reduced, so it chose not to push full performance. It’s near completion—check for options to prioritize peak performance over energy efficiency in both BIOS and Windows.
It seems this happens consistently or only at the end? If it runs all the time... likely an AVX offset is involved, leading the CPU to slow down during cinebench (which supports AVX). Otherwise, it might relate to Windows power settings.
it's not Windows; it consistently performs well after reaching 100% under both Cinebench and AIDA64 stress tests with high-performance power mode enabled. The AVX offset remains at 0, all CPU power configurations are set to auto, and adjustments have been made without any changes. Over-voltage, under-voltage, current, switching frequency, and VRM temperature settings haven't affected the results. This behavior is unusual—nothing similar has occurred before. It might indicate a faulty CPU.
I also observed that after the benchmark-stress test concludes, the CPU returns to 4.9GHz.
It could be thermal throttling without you realizing it, plus could you share your full system details? The PSU specs would also be useful, even if I doubt it’s the main problem.
i7 8700k msi z370 a-pro gtx 970 thermaltake smart se 620w likely lacks a proper PSU. When under heavy load it still runs, though I noticed thermal issues as well. In AIDA64 I saw no thermal throttling, but the CPU starts downclocking before reaching its maximum frequency. Also, after some time the clock drops to around 3.2GHz in the FPU.