I have problem with Gigabyte Z170x- gaming 5 F5x beta bios. When cpu is overclocked, no matter how, and start Xtu motherboard downclock cpu to 3,9-4,1Ghz. I tried everything that may help: power settings, lower voltages, lower memory frequency and nothing.
With F4 bios there isn't such issue, but the memory efficiency is low.
What can i miss? Any suggestions?