Intel Kaby Lake Core i7-7700K Overclocking Preview @ [H]

Discussion in 'Intel Processors' started by Kyle_Bennett, Jan 3, 2017.

  1. Kyle_Bennett

    Kyle_Bennett HardOCP MasterChef Editor Staff Member

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    Intel Kaby Lake Core i7-7700K Overclocking Preview - After having a few weeks to play around with Intel's new Kaby Lake architecture Core i7-7700K processors, we finally have some results that we want to discuss when it comes to overclocking and the magic 5GHz many of us are looking for, and what we think your chances are of getting there yourself.
     
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  2. Peter2k

    Peter2k Limp Gawd

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    mmm
    Getting a 7600k today or tomorrow (I'm not gonna spring 150€ extra just for ht, I'm not doing anything that could benefit from heavy multithreading)

    Wanted to delid the thing and replace the TIM

    But

    My shiny new Kraken x62 is taking a week longer to be available
    So I'll run it stock on my Formula VIII with an air cooler and see where OC'ing takes me

    Kinda before and after :D
     
  3. lukart

    lukart [H]Lite

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    Looking good! Someone got 7Ghz using the older Z170 oc-formula and LN2..
    Not sure if Zen will have the same luck considering the AMD past history.
     
  4. Kyle_Bennett

    Kyle_Bennett HardOCP MasterChef Editor Staff Member

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    The wall on good water looks to be 5.1GHz. And from what I am told, those CPUs are few and far between.
     
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  5. DarkStryke

    DarkStryke [H]ard|Gawd

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    What, no assurances of 5ghz overclocks on air (else you're doing it wrong noob!) like a certain other release? Whatever happened to that guy anyway?
     
  6. limitedaccess

    limitedaccess [H]ardness Supreme

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    I'm guessing you are still under NDA for the motherboard? Or are you using a Z170 board?

    What I'm wondering is regarding the memory overclock is that due to the newer motherboards or actually Kaby Lake. From what I can tell with all the z270 leaks from Asus specifically advertise higher memory support compared to equivalent z170 boards. And the Asus Z270 press release today specifically mentions that the new motherboards all use a newer design to facilitate higher memory speeds.

     
  7. tunatime

    tunatime 2[H]4U

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    finally we are back up to what sb would hit years ago. kyle do you have any guess to what % will hit 5 on good water?
     
  8. Trimlock

    Trimlock [H]ardForum Junkie

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    were you guys able to get it close enough to throttle at these stable settings?
     
  9. Kyle_Bennett

    Kyle_Bennett HardOCP MasterChef Editor Staff Member

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    All Z270 boards used.

    No clue. I am not feeling as good about it this week as I was last.

    I never saw any throttling of any kind in ALL of my OC testing. When they failed they just BSODed.
     
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  10. AbRASiON

    AbRASiON Limp Gawd

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    Wonder if the 7600k has a better chance? Fingers crossed.
     
  11. Calavaro

    Calavaro [H]ardness Supreme

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    Something AMD shill, screwing Intel out of their magic with 5.x++ O/C. And sticking it to the giant of the computer industry. etc.

    Keep up the good work.
     
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  12. BlueFireIce

    BlueFireIce [H]ardness Supreme

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    What sort of temps were you getting at those speeds? What did you have as "good water"? Do you think by the time retail comes around there might be board changes/BIOS updates that allow for better overall OCs?
     
  13. Kyle_Bennett

    Kyle_Bennett HardOCP MasterChef Editor Staff Member

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    We have one 7600K as well. We have only been able to get that one to 4.8GHz.
     
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  14. Dan_D

    Dan_D [H]ardOCP Motherboard Editor

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    I doubt it, but you never know.
     
  15. Kyle_Bennett

    Kyle_Bennett HardOCP MasterChef Editor Staff Member

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    Pic is there so you can see the load temps yourself.
    Written in the article.
    No.
     
    Last edited: Jan 3, 2017
  16. rgMekanic

    rgMekanic [H]ard|Gawd

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    82* under a decent custom loop... ouch, I'd be paranoid
     
  17. BlueFireIce

    BlueFireIce [H]ardness Supreme

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    Had to check on my phone, seems work connection was blocking the images? Who knows. I only saw "triple radiator" listed, nothing about what kind of rad or if that was 120x3 or 140x3 etc, along with fans, as 82C doesn't seem to good. My Swiftech H220-X only topped 78C hitting 5GHz on my 6700k and that was at much higher voltage than being reported for this CPU.
     
  18. Dan_D

    Dan_D [H]ardOCP Motherboard Editor

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    Speaking for myself, I only see temps like that under Prime95 or encoding tasks. I do not see that while gaming or in general usage. I'm using a Koolance Exos 2.5 with a CPU-370 waterblock.
     
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  19. BlueFireIce

    BlueFireIce [H]ardness Supreme

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    For myself, it depends on what radiator was used and what fans and what speed, as I like silent, which often means running pumps and fans much slower than most, and as such I tend to get much higher temps even while gaming. Being a triple, however, even with slower fans, bigger and faster probably would not do much, would probably need a delid to see real drops.
     
  20. kidstechno3

    kidstechno3 n00bie

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    Has there been a release date set for retail of these?
     
  21. Kyle_Bennett

    Kyle_Bennett HardOCP MasterChef Editor Staff Member

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    http://koolance.com/ex2-1055-exos-2.5-liquid-cooling-system-aluminum and new 370 block. Running pump and fans at highest settings.

    We do not shoot for silent when doing overclocking reviews.

    Yes, 6700K vCores are going to look very different from 7700K vCores.
     
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  22. BlueFireIce

    BlueFireIce [H]ardness Supreme

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    Oh I fully understand that, which is why I was wondering, trying to get an idea of what I would need to do to be silent at those clocks and running fans at 1k rpm etc. From the sounds of it, delidding would be required, my 6700k will be getting delidded here in the next week anyway.

    It also doesn't sound like yall are very confident on being able to get a chip that will do 5GHz anyway, and should aim for 4.7-4.8. Which my 6700k already is. I feel more and more depressed every new update yall give about the 7700k.

    Thank for the link!
     
  23. Dan_D

    Dan_D [H]ardOCP Motherboard Editor

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    There weren't that many chips in the Sandy Bridge days that could do 5GHz. I think I had three out of ten I personally tested that could. Water was required to do it in all cases. The rest all did 4.8GHz easily. I don't think I ever saw a Sandy Bridge CPU that could only do 4.7GHz or less. I know they exist but I never saw them. So far Kaby Lake is shaping up to be about the same. We'll see though as time goes on and we get more chips on the bench.
     
  24. Nimisys

    Nimisys [H]ardForum Junkie

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    The only real advantage it seems to have is running faster memory speeds.

    Problem is that the improvements have been so incremental over the last few years that you really can't get excited by it.

    I think that's why everyone is so excited by Ryzen, we know it won't be as good, but dammed if it is something different.
     
  25. Dan_D

    Dan_D [H]ardOCP Motherboard Editor

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    I think Kaby Lake is a bit better than that. Yeah it's incremental but the memory controller is better and we finally get clock speed parity with Sandy Bridge. Finally those IPC improvements don't feel like taking one step forward and two steps back.
     
  26. Kyle_Bennett

    Kyle_Bennett HardOCP MasterChef Editor Staff Member

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    If I gave you a 6700K and 7700K and had you play around with 5 of each on a test bench, I think the only way you could discern the two from each other would be vCore and RAM speeds. Even when looking at the new 7700K iGPU in terms of encoding using H.265 QuickSync, you can't tell the CPUs apart.
     
  27. Dan_D

    Dan_D [H]ardOCP Motherboard Editor

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    Sadly, this time we didn't even get the usual 3% to 11%.
     
  28. gigatexal

    gigatexal [H]ardness Supreme

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    So I'll have to delid my chip to hit the same speeds without fancy custom watercooling? Challenge accepted!

    Thanks for the preview guys!
     
  29. Teenyman45

    Teenyman45 [H]ard|Gawd

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    Since Sandy Bridge there have been roughly 5% increases in aggregate average IPC, but also roughly 5% reductions in max OC clockspeed so it was a wash except for improvements in special instruction sets and motherboard features like m2 slots.

    Performance per watt is pointless for single socket home use/ prosumer once you start overclocking. I've never really understood why people who would buy chips like a 7700K, overclock it to the limit, and then complain about wattage or thermal loads.
     
  30. Palladium@SG

    Palladium@SG Limp Gawd

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    I never understood why people would want to bother OC a 7700K anyway besides obvious e-peen issues.
     
  31. gigatexal

    gigatexal [H]ardness Supreme

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    Um because we're [H]ard
     
  32. Kyle_Bennett

    Kyle_Bennett HardOCP MasterChef Editor Staff Member

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    Oh jeezus, it's "that guy" again on an enthusiast computer hardware forum....
     
  33. Dan_D

    Dan_D [H]ardOCP Motherboard Editor

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    There is always at least one.
     
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  34. lolfail9001

    lolfail9001 Gawd

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    Well, how about the proper [H]ard question: there were reports that delid improved OC potential as well as temps. Will you consider doing it to one of CPUs you have or shall purchase?
     
  35. limitedaccess

    limitedaccess [H]ardness Supreme

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    I asked this earlier but is the higher memory speeds actually due to Kaby Lake memory controller improvements or z270 board design improvements? Or how much is attributable to each factor? As I believe the mobo makers are advertising higher memory speeds due to improved design.

    This is of course largely academic to some extent but I'm wondering what memory speed results would with a 6700k in a z270 board vs a 7700k in a z170 board? This information be somewhat relevant to those looking to pair Kaby Lake CPus with z170 boards or even the reverse (although a less likely scenario).

    On a more practical personal note I'd be interested in a gaming review with memory speeds clocked high targeting games such as Fallout 4 and similar scenarios which might be highly affected. Can we play FO4 without the dips in certain sections?
     
  36. Dan_D

    Dan_D [H]ardOCP Motherboard Editor

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    To some degree, there is an improvement in the motherboards. Last generation there were several motherboards that had fewer PCB layers and lacked the capability of carrying the higher frequencies over the memory bus. Additionally, not all motherboards are equal when it comes to memory power implementation. That said, those things can still happen this generation but we are told we shouldn't see that this time around. At least not with the earlier crop of motherboards hitting the market. We were also told that the memory controller on Kaby Lake is flat out better and so far our testing seems conclusive that this is indeed the case. Kaby Lake doesn't seem to lose stability when pushed to the edge of an overclock with the memory clocks being way up there. Its still possible to find CPUs that may clock higher clock speed wise but do less well on the memory front. So far the two I've tested can do 3600MHz easily at 4.8GHz. I have some DDR4 3866MHz memory as well but there are some issues with it and Kaby Lake. It doesn't detect properly and is flaky at those speeds with those CPUs. I couldn't even push that memory to DDR4 3866MHz on all Z170 or X99 motherboards regardless of the CPU used.

    So indeed, there are multiple factors that effect memory clocks but I think its safe to say that its one area where Kaby Lake is much improved over even Skylake. Its an even larger improvement over Haswell-E and Broadwell-E.

    I do have a 6700K on hand. I didn't have time to do it with this review but I was curious at how it behaves on the newer Z270 motherboards.
     
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  37. Kyle_Bennett

    Kyle_Bennett HardOCP MasterChef Editor Staff Member

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    Send me one I can afford to destroy and I will fully document the entire procedure on video.
     
  38. Kyle_Bennett

    Kyle_Bennett HardOCP MasterChef Editor Staff Member

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    My guess is that it is nearly 100% due to the CPU's IMC. That said, let me throw one on right now and see. :)
     
  39. Kyle_Bennett

    Kyle_Bennett HardOCP MasterChef Editor Staff Member

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    OK....I only have one 6700K here left to test with at this time, so this is a narrow look. This is on an MSI Z270 Gaming M7. I just took the 7700K off this board that was running a rock solid 5GHz/3600MHz with 32GB of Corsair RAM using the XMP profile settings.

    With the 6700K set to full stock optimized "stock" settings with just the XMP profile enabled, the board will not even POST. I tried with two sticks and four sticks, same no-POST.

    Hardware pr0n for fun. :)

    Z270XPr0N.jpg
     
  40. Kyle_Bennett

    Kyle_Bennett HardOCP MasterChef Editor Staff Member

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    Now this is extremely interesting. Given these CPUs have an iGPU, I uninstalled the TITAN X card I had on this system. Now "logic" tells me this should not impact the IMC positively at all, but I figured I would give it a shot. I have this 6700K up and running at stock 4.2GHz but with the Corsair RAM at 3600MHz with the XMP profile. Running a HandBrake encode to see if it will work then maybe some RealBench. Still very strange. Keep in mind this is all "from the hip" testing, which is not normally how we would do things we were writing an article about. We like to see something work more than once before drawing conclusions.

    6700Kat3600Desktop.png

    Z270Pr0n2.jpg
     
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