- #INTEL I7 4790K TURBO BOOST HOW TO#
- #INTEL I7 4790K TURBO BOOST MANUAL#
- #INTEL I7 4790K TURBO BOOST WINDOWS 8.1#
A 300MHz clock increase from 4400MHz is a 6.4% increase, so this is about what you’d expect to see.Īt 4.7 GHz we saw the temperatures hit 76C, which isn’t bad considering Haswell and Devil’s Canyon don’t start throttling till 95C. We got a score of 900 stock, so this is a modest 5% performance gain as we are only overclocking 300MHz as the turbo clocks on this chip are at 4.4GHz. With the Intel Core i7-4970K Devil’s Canyon processor running 4.7GHz we were able to score 946 on the CPU test in Cinebench. We don’t have any retail 4790K chips to play around with though, so our opinion is based on our experience with our engineering sample. This just happens to be the top overclock for our Core i7-4770K processor as well, so when it comes to overclocking performance the Core i7-4770K and Core i7-4790K appear to be about the same.
This was the easiest 4.7GHz overclock that we have had on any Haswell processor! It appears that the ASUS Z97-A automatically increases the voltage and in this situation we were running at 1.351V on the core. We were able to do this by leaving everything in the UEFI/BIOS untouched and just raising the multiplier up from auto to 47. We ended up settling for 4.7GHz as that was the highest stable overclock that we could achieve on this processor.
#INTEL I7 4790K TURBO BOOST WINDOWS 8.1#
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. The i7-4790k tends to have high default voltages. 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. Intel says running all 4 cores at 4.2Ghz should run at least a minimum of 1.100v I need to see CPU-Z to see what CPU speed you are running and at what voltages. 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 I7 4790K TURBO BOOST HOW TO#
Please also see our general buying guide, motherboard compatibility list and FAQs for further help on how to select the best cooler for your configuration.Intel Core i7-4790K Devil’s Canyon CPU Overclocking Therefore, if two CPUs are identical except for one having lower clock speeds, the same cooler will score higher on the CPU with lower clock speeds.įor further information on CPUs exceeding their TDP ratings and how to configure the UEFI BIOS in order to avoid excessively high temperatures, please see this FAQ. "compatible without turbo/overclocking headroom" means that a cooler can keep the CPU at base clock and "best turbo/overclocking headroom" means that a cooler can go close to the maximum specified turbo boost speeds. Note that the turbo/overclocking headroom is classified in relation to the specified base and turbo clock speeds of the CPU, i.e. We classify our coolers according to the following categories:Ĭompatible without turbo/overclocking headroomĬompatible (CPU doesn't offer turbo or overclocking functionality)Ĭompatible with certain restrictions (see comment) Our CPU compatibility list helps you to choose (choosing) the cooler model that is best suited for a given CPU and your individual requirements as far as turbo and overclocking headroom are concerned.
#INTEL I7 4790K TURBO BOOST MANUAL#
Just like manual overclocking, this puts higher demands on the cooling solution. When modern CPUs use their turbo modes, they can (depending on the configuration of the UEFI BIOS) dissipate much more heat than indicated by the manufacturer’s TDP (Thermal Design Power) specification.