We start out with stock settings and try to see how far we can push the CPU and memory systems before we encounter system instability or crashing. Once we find a benchmark stable overclock, we run a few tests and note the increase of score. For fun, we often push the clock up as far as it will go and still boot to windows. While not in any way stable, it’s fun to see how far you can actually push it.
With our CPU at an idle speed of 1.2Ghz with nothing running, we head to the BIOS to try out some overclocking.
Using the EZ tuning wizard is as simple as answering a few basic questions, and letting it go to work.
It ended up giving us a touch over 4.5Ghz, which is a great jump over the stock 3.6Ghz, but we know this particular CPU can do more.
Poking around a but manually, we managed to push the i7-7820X to a hefty 4.95Ghz!
Now we’ll move on to something more ‘Extreme’ to see if it can handle something more its namesake.
Overclocking the i9-7980XE Extreme Edition.
Even though the base clock speed is 2.6GHz, the CPU cores spend much of their time bouncing around the 3GHz range at idle due to Turbo Boost helping out the miscellaneous tasks Windows 10 is always chewing on in the background. Here we happened to snag a screenshot while it was hovering at 3.4GHz on the core we were monitoring.
Moving in small steps since we expected to reach issues at a much lower clock speed, we kept bumping the multiplier higher and higher, we a reboot and test each time. Our test motherboard kept up with core voltage until about 4.4GHz where we had to manually take control of the voltage to carry on. In the end, we were able to reach a multiplier of 46 across all cores, and then nudge the base clock up to 101.1MHz to give us a staggering 4.65GHz at 1.26v.
Considering our stock Cinebench score was an already awesome 3329 CB, pushing this CPU to over 4.6GHz nets us a whopping 4473 CB. With our ram overclocked from 3200MHz to 3733MHz, we were able to achieve our best single socket score ever of 4506 CB.
Since we have another monster CPU sitting here, we’ll throw it on as well.
Overclocking the i9-7960X
Moving in small steps since we again expected to reach limits at a much lower clock speed, we kept bumping the multiplier higher and higher, we a reboot and test each time. Our test motherboard kept up with core voltage until about 4.4GHz again before it got too high (and too hot) where we had to manually take control of the voltage to carry on. In the end, we were able to reach a multiplier of 47 across all cores to give us an impressive 4.7 GHz at 1.27v across all sixteen cores.
The CPUz screenshot shows a minor miracle. 4.7Ghz times 32 threads is just crazy. The ROG Rampage Extreme handled it with ease and never gave us a problem.
Considering our stock Cinebench score was an already awesome 3168 CB, pushing this CPU to 4.7GHz nets us a score just over the 4000 point threshold. With our ram timings tweaked, we managed to nudge the score up to 4063 CB.
Just a quick recap of everything here in one chart. The GeIL memory kit didn’t overclock as far as the Dominator kit did on our Apex review, but the Rampage VI Extreme is still capable of pushing some serious overclocking of everything connected and handled Intel’s biggest CPUs without really trying.