![]() We ended up settling for 4.7GHz as that was the highest stable overclock that we could achieve on this processor. By doing this we were able to enter Windows 8.1 and run a few benchmarks at 4.9GHz with 1.35V, but we just couldn’t get it fully stable and we didn’t want to go over 1.4V on the first few days that the 4790K was in our hands. We just cranked up the vCore and kept raising the multiplier until we got to 1.40V on the core and the system became unstable. We got into the ASUS Z97-A UEFI and manually did the overclock in AI Tweaker. It looks like we are off to a great start, but this is only 190MHz higher than the turbo clock speeds of the Core i7-4790K Devil’s Canyon processor. The ASUS board automatically bumped up the multiplier from 44 to 45 and increased the Bus Speed from 100MHz to 102MHz as you can see in the screenshot above. We used the ASUS overclocking assistant on the Z97-A motherboard and was able to reach 4.59GHz in just a matter of seconds. For this review we wanted to see what we could hit with the Corsair H105 water cooler and we were hoping that the rumors of 5GHz Devil’s Canyon processors with water cooling would prove to be true. We heard that reaching 4.7GHz should be easy for most platforms with high-end air coolers or water cooling. The Intel Core i7-4790K processor starts out life with a 4.0GHz base clock and can boost up to 4.4GHz. Intel Core i7-4790K Devil’s Canyon CPU Overclocking
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