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Basic Skylake 6700K Overclocking review and performance.

OcUK Staff
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Exactly as I did with Haswell-E, X99 Launch I wanted to compile a short review showing the Overclocking of the new Skylake i7 6700K on very basic air cooling and mid range MB. Then potential buyers from OCUK can see what kind of overclocking potential this new chip has with very minimum effort. This is the highest priced Skylake offering running at 4ghz stock with hyper threading so you have a total of 8 threads can be handled simultaneously in applications supporting multi threading.

With this in mind I chose the well priced with decent features ASUS Z170 Pro Gamer MB, Kingston 3000mhz Predator DDR4 mems and a Zotac 980 Ti amp edition. I chose the Ti to remove the GPU bottleneck while benching at 1080p and shift the bottleneck back to the CPU.

All Skylake 6700K chips I have tested can run 4.5ghz+Core Clock, 4.1-4.5ghz Uncore on basic air without any bump from the 1.3v stock voltage. On this board I simply set 1.3v for core. 45 multi and XMP and there I was with stability in Windows running all I could throw at it. Good samples can of course go higher but all the samples I tried did have consistency in how they clocked and like I say 4.5-4.6 was a minimum which anyone could achieve by making a couple of settings.

Here are the benchmark results for this chip running at 4.5g with 3000mhz mems and 4.1 uncore on air.

3D mark 11


Firestrike


Terragen 3


Cinebench R15


To give the reader some idea of how Skylake i7 6700K at 4.5ghz Compares to Haswell E 5820K at 4.2ghz on air with the same cooling, 2400mems and 3.5 uncore I have provided screen shots of the Haswell E's performance below.

3D mark 11


Firestrike


Terragen 3


Cinebench R15


What was surprising for me about these results is that as expected on all multi threaded stuff the X99 platform smashes the Z170 Skylake. Terregan and Cinebench both heavily multi threaded benefiting from both cores and threads as do games based physics or combined tests.

What I did not expect and what is certain is in 3D game based benches the FPS was very very close indeed with Skylake faster yes but only by around 2-3% in 3D mark 11 and Firestrike. This makes X99 look amazing value considering its other benefits.

Wanting to explore this further I switched out the 980 Ti for a 970 which is the current mid priced gaming card of choice for the masses. In both Heaven and Valley which are only game tests run maxed out at 1080p the X99 system with a 970 clocked equally on both gave less than 1 FPS difference when benched.

For me at this specific price point X99 is king and does not need high speeed DDR4 to achieve this position.

i5's are not really my realm of interest but I can confirm the i5 Skylake samples I tried using these same basic settings all hit at least 4.5ghz. This consistency is much welcomed.

X99 Anyone ;)
 
im looking to upgrade from a AMD 8350, i mainly game and rest is general browsing, i see the boards for the 5820k cost quite abit more,

so would 6700k be good for me ?

Thanks

Watch this space we are doing a very cost effective 4.2ghz X99 Bundle.
 
question are if skylake hits 5ghz with ease or its a struggle as previous gen chips.

Not with ease for sure not.

Even good samples you need 1.425 - 1.45 v and this hits the thermal limit of the chip if your stress testing.

Very good samples can do it yes below the recommended 1.4v. But these are very few indeed.
 
I tested around 10+ i7 and like 5 i5. Not so many as we have very few OEM.

What we are seeing from these benches is about 2% single threaded improvement over X99. This is at most. When I tested with 970 it was less than 1fps. But X99 crushes on multi threaded games, physics based games and all rendering multi threaded tasks for similar money.
 
hmhm thanks again!
dam a little disappointed >.<
mostly bcos of seeing some cool looking new motherboards

guess the good news is average overclocks seem ok!

Average are good and consistent yes.
 
Skylake-E yes probably much better, but this is sometime away and will require a new X chipset MB.
 
Well, I have a 980Ti and I'm pretty sure the CPU is bottlenecking me in GTA V now, and it'll only get worse in time.

I need recommendations now since I've been out of the loop for so long I'm just confused.

5820K X99 go go go!!!
 
Deluxe is great. I have used that quite abit recently. All have OC socket so no real issues with high RAM, Cache etc should you want to go that way.

They are so good we are just building an 8Pack Polaris with that board as it offers the colour scheme the end user wants and I can get 4.7+ 5930K no problem.
 
Nice read! What cooler was this on and how were the temperatures?

I used the Alpenfohn Matterhorn for all this testing. Its a decent air cooler and blocks no RAM slots.

My favourite air cooler is Megahelms but its more expensive for only afew degree C improvement.
 
I have not tested that cooler. But should be fine yes. I am almost 100% certain its compatible.
 
All 5820k I recently tried can do 4.2 at 1.2 on basic air. For 4.5+ in general u need water but the IHS is soldered so no delid.

The maximum, minimum frame rates 4.2 5820 vs 4.5 6700 was within 2fps when I tried on bf4 and crysis 3 with 970 at 1080p

I have delided about ten of these 6700k CPU. The paste in my opinion is simply awful. On ln2 pot temp -186 I have seen a CPU throttle at 100+ with 1.65v. Really junk TIM.
 
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5930k hit and miss I think. I tested like 10 or so two weeks ago. 1x 4.7-4.8 , 3x 4.6, 3x4.5, 3x4.4 testing 1.25-1.3v all testing on water.
 
15% ST is way out in my testing. Not even 10% for me.

For gamers of course high quality card most important. For Gamers who do other things also add X99 and be done!!!
 
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Nick has done 6.9+ I know that.

Yes there is some gains from memory but similar to all other platforms not massive gains.
 
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