Overclocking remains ineffective when under stress.
Overclocking remains ineffective when under stress.
Hey there, I'm not a pro in overclocking. I got a used i7-6700k with a Z170 board, and I've kept it at 4.5 GHz across all cores. The system works fine, but when I push it to multicore load it slows down right away. It's not related to overheating—this was tested with Cinebench R20 Multicore and the built-in utility. For single-core it stays steady, though it looks like the workload is split between cores in Task Manager. I tried a small overvoltage boost (+0.020 V) but didn’t go further and it didn’t help. Any experienced folks, could you share some tips to keep this stable?
Set XTU to its default state and remove it. Ensure all K CPUs remain overclocked in the BIOS.
The 4.5 GHz Overclock is configured in BIOS, a colleague suggested installing a utility to verify the settings. Also, I’m unable to capture screenshots within the BIOS.
Sure, just remove XTU, install CPU-Z, and let me know your motherboard and CPU cooler. I’ll guide you through the BIOS setup.
It shouldn't run at full speed constantly when nothing is happening. The screenshots suggest it's hitting around 4.5GHz under stress, with the scheduler moving tasks between cores—just one core handling each split second. If it lacks a camera, it might be outdated.
Only under Single Core Load and Idle, Full Load does the performance stay at 4.5, while it drops elsewhere. The issue doesn’t appear to be related to cooling. Thanks for the advice—I tested it, but no throttling was detected. The CPU package power spikes around 80W, and the stock TDP is 91W (though I’m not sure if that’s comparable). I included a log file as an attachment, but it may not provide further details.
It confirms a positive response. Under Prime95 stress testing, it directs to another endpoint.
This guide isn't about CPUz, it's Hwinfo. First update your BIOS. https://www.msi.com/Motherboard/support/Z170M-MORTAR I suggest using version A.9 or 7972vAA. Make sure XMP is turned on, disable C-states, speed step and turbo boost, and enable spread spectrum. Activate Load line calibration at a moderate setting. Set all core fixed voltage to 1.3V. Use a multiplier of 45 for all cores. Configure base clock / bclk to 100.5. Disable fast startup in Windows power settings. Turn on High Performance power plan.
You're experiencing a persistent issue that remains unresolved. Even after restarting HWinfo and resetting values, the system stays stuck in 'yes' mode. Running Prime95 hasn't altered the situation. I'll give it another try. Likely, it will be late tomorrow to fix this.