Overclocking on the Z490 platform is pretty much the same as on the Z390 platform. So if you are familiar with that, overclocking your 10th gen Intel CPU will be pretty easy. We will be doing all of our overclocking in the BIOS.
So in our BIOS the first thing we are going to want to do is go into the Extreme Tweaker section. Scroll down to “CPU Core Ratio” and set this to “Sync all Cores”. Right below that set the “ALL-Core Ratio Limit” to what you are shooting for. You will need to enter this value manually. For our Core i9-10900K we started at 50 and went up from there.
Now scroll down to the voltage setting in the same menu. Under “CPU Core/Cache Voltage” change this to “Manual Mode”. When you do that another option called “CPU Core Voltage Override” will pop-up. Set this to the voltage that you want, 1.30V is a good place to start, we ended up on 1.33V for our specific overclock.
With these settings we were able to achieve an overclock of 5.2 GHz across all 10 cores of the Core i9-10900K.