Intel i7 4790K Devils Canyon CPU Review

Test Setup, Overclocking and Temps

Intel i7-4790K Review

Test Setup

With a new CPU we decided to start off with the ASUS Z97A. This is the cheapest and most 'standard' of our Z97 motherboards, so it makes sense to begin there.

Intel Core i7-4790K
nVidia GTX780Ti
Corsair Vengeance Pro 2400MHz
Corsair AX1200i
Corsair Neutron GTX
Corsair H100i
Windows 7 x64 


As very much a minor refinement of the i7-4770K, we would expect to find an improvement in the low voltage scenario's. At the other end of the scale, with the greatly improved thermal performance, we'd hope to have more voltage to play with.

As it is the i7-4790K hits both these marks with ease. Running at the stock speed of 4GHz we were able to drop the voltage down to 1v on the vCore, which is barely believable. 4GHz @ 1v. At the high end the i7-4790K allowed us to pump a whopping 1.35v through whilst keeping the CPU beneath our 80°C target. This gave us 4.8GHz which shows how much of a golden chip our 4770K is.

Of course we wouldn't run 1.35v all the time, so for our overclock benchmarks we're sticking to 1.26v, which enabled us to hit 4.6GHz. Only 200MHz above the 4.4GHz Turbo speed of the latest Intel offering, so our stock/oc comparisons should be close.

Intel i7-4790K Review     Intel i7-4790K Review  

Intel i7-4790K Review


The change of thermal interface material has had an enormous effect upon the temperatures of the i7-4790K. 64°C at stock, and 76°C when overclocked. A big drop for just a change of thermal pad.

Intel i7-4790K Review  

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Most Recent Comments

13-06-2014, 09:46:26

Nice review thanks.

If I could get the same 4.80GHZ overclock with a 4970K that I have with my 4770K then I would definitely buy one but I'm not lucky with the silicon lottery Quote

13-06-2014, 10:09:17

Very nice review Tom. Thank you for the time in trying to enlighten us about the differences from the 4770k cpu. I probably will get one for the Maximus VII Hero rig that I hope to finish in the next couple of months. The 4770k I have now is not a strong one from what I can see. I might get a better entry in the lottery with a new chip. I am also hoping you go back to the VII Hero board with the DC 4790k chip. Your review of that board was what made me buy it on day 1 when it came available. I really hope the combo with the DC chip will be a "Epic Win"

Thank You Again!


13-06-2014, 10:21:16

Good review as always Tom, the 500MHz boost over the 4770k is nothing to take lightly at stock and the improved thermals is always good.

While it is a shame that the average overclocks for DC is not any higher than vanilla haswell, the improvements are always welcome.Quote

13-06-2014, 11:07:20

the non K cpu doesn't turbo to 4.4Ghz, only the K one.Quote

13-06-2014, 11:47:17

Hitman absolutely (heh) loves the overclocked 4790K
I almost lost it with that subtle joke
Great review, and I'm not sure why I don't know this but do you need a z97 mobo for devil's canyon, I currently have an i3 and want to upgrade by the end of the summer (no job makes it hard) so will it be the 4670k or 4690k that I'll be (hopefully) getting?Quote

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