8700K 5Ghz drops to 4.2ghz following a 10-second stress test
8700K 5Ghz drops to 4.2ghz following a 10-second stress test
Hi,
I hope you can assist me with this overclocking project.
My setup includes:
i7 8700k
msi Z370-A PRO
Corsair Vengeance LPX 3400mhz 2x8
cooler master hyper 212X dual fans
Thermaltake Smart 700W 80+
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I've increased the CPU frequency to 5hz on all cores with a voltage of 1.345v and LLC level 4. However, during a 10-second stress test, the core clock drops to 4.2ghz and sometimes to 4.1ghz.
Using CPU-Z, I achieved around 4300 points, but after 10 seconds the score decreases to about 3900 points.
My motherboard's VRMS max temperature was approximately 65°C, while my CPU peaked at around 90°C.
Please see the attached pictures for reference.
I fixed the problem using Intel® Extreme Tuning Utility.
😀 Just increased the Turbo Boost Power Max to 125W in my setup, and it consistently reached 5GHz with temperatures around 95°C – that’s quite high.
Do you have your CPU at full capacity in the Control Panel or All Control Panel items? Also check the Power Options, Plan Settings, and Advanced Power Settings. The processor power management should be set to Minimum Processor State. I also noticed that 90C is too high for regular use; it’s better to keep it around 80C max during stress tests.
PS: AVX is disabled and the clock speed is 4400mhz.
First of all, cpuz isn't meant for stress testing. To push your CPU harder, you should use Aida64, prime95v2.26 or similar programs. Second, your low temperatures are around mid 40°C. They should be higher, between upper 20s to low 30s when idle. The heatsink isn't designed for a 5.0GHz overclock. It's fine for stock performance up to about 4.5GHz, but beyond that it's limited. I assure you, if you run a real stress test with this heatsink, you'll likely see temperatures exceed 100°C and the CPU will throttle immediately. Consider using a better heatsink next time.
Personally, I favor AIO liquid coolers. Something similar would work well for your setup.
https://www.newegg.com/Product/Product.a...4UF1H68938
Also, nothing in your control panel affects how your CPU overclocks—it's all handled by the BIOS.
Urbancamper explains that cpuz isn't meant for stress testing. For CPU stress, use Aida64, prime95v2.26 or similar tools. He also mentions his low temperatures are around mid 40°C, which should be higher than 20 in idle and lower than 30 at full load. He warns that a heatsink designed for 5.0GHz overclock won't work well; it's fine for stock up to about 4.5GHz, but not recommended beyond that. He advises getting a better heatsink if you want stability.
He shares his preference for AIO liquid coolers and links to a product page.
He adds that the temperatures he experienced (4.7GHz) were similar on other systems, confirming overclocking is mainly controlled by BIOS settings.
Here’s another perspective on the situation. I increased my 8600k to 5.1ghz, but the vcore is quite high for regular use. Stress testing with prime95 would likely cause excessive temperatures for my Corsair H100v2.0. Still, Cinebench runs are manageable without overloading the CPU. My H100v2.0 clearly outperforms your Hyper 212x in this regard. Given these facts, I’m curious how you manage such heat levels. I plan to run a ten-minute prime95 test at 5.0ghz with lower voltage next.