With so much ridiculous horsepower in the system, (engineering samples we must add) we could not resist trying out overclocking. We're keeping it simple, but anything over Gulftown on LCS (roughly 4.2 GHz) always is a win in my book for this six-headed beast. Pretty much we need to take a couple of steps if we want to overclock. Invest in good hardware by the way, the cheaper motherboards often are not well tuned for enthusiast overclocking.
The true Guru3D audience overclocks from the BIOS and try to find the maximum stable limit. The generic overclock procedure for multiplier based overclocking is as follows:
Leave baseclock for what it is right now
If optional in the BIOS, increase your TDP limits of the processor to 250 Watts (by that you are allowing a higher power draw)
Leave your base multiplier at default e.g. 34
Set the per core Turbo multiplier at a maximum of your liking, we applied an MP of 50 on all six cores
Increase CPU voltage, though setting AUTO might work fine, we applied 1.5V on the processor cores
Make sure your processor is properly cooled (we used the Corsair H90 LCS cooler)
Save and Exit BIOS / EFI
You should allow a baseline clock of roughly 3600 MHz that can actually still throttle down to 1200 MHz in idle, which helps us in power consumption. However, once the processor gets a kick in the proverbial nuts, it can turbo any or all cores towards that multiplier of 46 times that 100 MHz baseclock frequency, that's a 4600 MHz configuration.
Let's have a quick look at a Prime95 stress test with all four cores active and stressed at ~4600 MHz. As you can see, you'll need a rather reasonable cooler as temperatures are on the borderline of acceptable. Then again, six-cores all at 4.6 GHz with a high-voltage, we didn't expect any less.
So the OC potential is a little "meh", heat becomes an issue fast. Especially combined with 6 active CPU cores. We used a Corsair H90 liquid cooler BTW. Adding on frequency and voltage does have an adverse side effect, power consumption. Our overclock makes the CPU use an additional ~125 Watts.
Core i7 4790K Processor Review We review the Intel Core i7 4790K processor aka the Devils Canyon architecture from the Haswell refresh series. Join us as we look at the performance of this processor in a wide variety of benchmark, ...
Core i7 4790 processor review We review the Intel Core i7 4790 processor, the Haswell refresh processors are finally here. Join us as we look at the performance of this processor in a wide scope of benchmarks, will it be noticeably faster then say t...
Core i7 4960X processor review Today an article covering the Core i7 4960X (Ivy Bridge-E) on a X79 based motherboard. Intel's most high-end processors just got updated with a high-end six-core processor series aimed at consumers.