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Thread: ASRock Z87 Extreme6 OC issues (UEFI 2.10)




  1. #1
    scorpian007 is offline Junior Member
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    Unhappy ASRock Z87 Extreme6 OC issues (UEFI 2.10)

    Hey all!

    I'm new to this forum so be gentle :)

    I've been tearing my hair out the last few days trying to work this out and I have no idea what is going on. I'm by no means an expert overclocker but I wouldn't call myself a novice either. I've managed to overclock my 4770K to a modest 4.3GHz at a fixed voltage of 1.19v and temperatures under load in OCCT are acceptable (just under 80 degrees on my aging H50 cooler). When the CPU downclocks to 800MHz in Windows, the voltage doesn't drop, just stays at 1.19v so I've enabled adaptive mode in the UEFI hoping to use the power saving features that Haswell offers, and while it does lower the voltage when idle to around 0.72v, the voltage jumps up to a whopping 1.27v in OCCT which causes the CPU to overheat very quickly and the test to fail. I've tried manually setting up an adaptive voltage but no matter what I set it to, it makes no difference.

    Has anyone had any issues with this? I'm wondering if I'm doing anything wrong or if the UEFI is just broken?

    Thanks all
    Last edited by scorpian007; 08-20-2013 at 09:28 PM.

  2. #2
    Shiari is offline Member
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    Default Re: ASRock Z87 Extreme6 OC issues (UEFI 2.10)

    You may not have the best overclocker by the sound of it, though it could be related to your cooler as well. Haswell really does get hot when pushed (why I got one of the best air coolers possible).

    In my experience, for adaptive voltage you want to set the base voltage to about 1v, then the offset to 190mv if 1.19v is where you like to end up at. However, keep in mind that what you have set is not necessarily what the CPU will get, benchmarks and stress tests particularly may demand and get a higher voltage. The idle voltage of 0.76v does sound about right though. For me, benchmarks can push it to about 1.325v ... with 1.257 set as the total adaptive voltage, so much higher than I've asked for.

    All that said, don't worry too much about benchmarks ... they're useful for helping to get to a "stable" overclock, but unless you're running benchmarks all day long you won't be seeing those temperatures in day to day use. Best test stability with software you'll actually use. I've found some Handbrake encoding of a full length movie to be a pretty good stability test, along with playing games.

    You should also do a search on this forum, we've had a lot of discussion about Haswell overclocking on the Extreme 6 already.

  3. #3
    scorpian007 is offline Junior Member
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    Default Re: ASRock Z87 Extreme6 OC issues (UEFI 2.10)

    I had a look at some of the previous threads but didn't really see anything that matched my issue.

    My CPU doesn't OC too well, I could probably get 4.5GHz @ 1.27v but it overheats under OCCT really quickly. I think my cooler just sucks though, might have to invest in a H100i.

    It seems like the adaptive voltage pushes it way too high even when I set a manual voltage. It's almost as if it's completely ignoring the voltage that I set in the adaptive settings and giving the CPU what it 'thinks' it needs. Would be nice if you could set a maximum in the adaptive voltage and it stayed under it :)

  4. #4
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    Default Re: ASRock Z87 Extreme6 OC issues (UEFI 2.10)

    Check out 3 Step Guide to Overclock Your i7 / i5 Haswell Platform | Overclockers in the Adaptive Voltage section:
    Adaptive Voltage

    Adaptive voltage is a lot smarter than your average offset voltage. What it does is raise the part of the voltage curve that you need under load, but leaves the lower end of the curve (when the CPU is operating at 800 MHz) alone. Thus, the higher voltage you need is there when the CPU calls for it, but you have no increase in idle voltage at all. This is going to be the best choice for letting your CPU breathe, as it were, when idle. You set the maximum voltage you want the CPU to get and go on your merry way knowing the CPU can draw the voltage it needs when it needs it.

    A picture is worth a thousand words, and this slide outlines the voltage override modes quite well.
    Various Integrated Voltage Regulator Configurations




    Caveat big, massive, honking, pay attention to this caveat! When using adaptive voltage, the top of the curve isnt necessarily the whole story. ASUS drove this point home when we met and Im doing so now; we all need to do this as a public service to our users and readers. Even though you set 1.25 V as your maximum voltage, under certain very heavy loading conditions (i.e. stress testing), the voltage can and will exceed the maximum you have set. Let me say that again if you stress test using adaptive voltage, even with the maximum set to 1.25 V, the CPU will guaranteed request and receive more voltage than you have told the motherboard to deliver it. Its just the way this works.

    In the ASUS demonstrations, setting a maximum 1.25 V in this scenario and then running something like AIDA64, Prime95, etc any stress testing application designed to stress more than normal loads the CPU requests and gets ~1.36 V. There is nothing you can do about this and it will happen whether you want it to or not. The only way to prevent stress testing programs from pulling extra voltage is to use a manually set voltage, which takes away your CPUs ability to reduce voltage when idle.

    All is not lost though! You probably noticed every time I told you what would happen it went hand in hand with stress testing. Thats because those are the only scenarios that will lead to this behavior. In all other circumstances so far as ASUS can tell, the CPU will cap at the set 1.25 V and never exceed it. Even if youre Folding@Home it should maintain the 1.25 V cap (though those folding at home are under 100% load all the time and Id suggest using a manual voltage for those machines just in case). Likewise, video encoding, audio encoding, compression, rendering any CPU-intensive process, your CPU will maintain the 1.25 V cap.

    So, now that you know the very important caveat, set 1.25 V as your maximum voltage with adaptive voltage, enable C1E and EIST (which throttle your multiplier and voltage when not under load) and go on with your merry life knowing your CPU is as relaxed as it can get when idle.
    Last edited by profJim; 08-20-2013 at 10:24 PM.
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  5. #5
    Shiari is offline Member
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    Default Re: ASRock Z87 Extreme6 OC issues (UEFI 2.10)

    I'm no fan of the AIO water coolers. Not personally used any, but I'm reading a lot about them elsewhere. They're quite noisy compared to an air cooler with good fans, and when either of their two moving parts (fans, but particularly the pump) fails you have a serious problem and your CPU will kill itself. You also have a small risk of leaks. That said, air coolers have some issues too: not all ram fits well under them, and some are huge, which is a problem if you have a smaller case. But your CPU won't fry immediately if the fan(s) fail. Performance wise a good air cooler will pretty much match the performance of an AIO.

    And again, are you going to be running OCCT all day? Sure, my 4770K @ 4.6 hits 85-95 degrees on stress tests as well, but it's stable and won't throttle (which ruins performance) which is really what matters. The chip can take that for a while for sure. Under normal load it might hit mid 70's or so.

    For the adaptive voltage you really need to keep that base voltage high (around the 1v mark) or your voltage may shoot up way higher than you'd expect. Don't know why, but it's what we have noticed ... we've discussed that here before as well.

  6. #6
    scorpian007 is offline Junior Member
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    Default Re: ASRock Z87 Extreme6 OC issues (UEFI 2.10)

    Thanks for the response profJim, looks like there is nothing I can do about it. I guess I wasn't doing anything wrong after all :)

    I was actually looking at a Noctua NH-D14 because of it's amazing performance but there is no way it would fit with the Dominator Platinum RAM modules I have so I'm stuck with AIO solutions for the time being.

    I guess I'm just being paranoid about worst case scenario. When I run Handbrake the voltage stabilises at 1.2v at 4.3GHz which is fine and temps hover around 60-65 degrees. I doubt games will push the CPU as hard as Handbrake or OCCT does so I don't think I need to worry in that case.

    I'll muck around a little more with the adaptive voltage settings a little more. What would you suggest as a base and offset value? Should I leave the cache at auto? And should I just leave the input voltage at 1.9v?

    Thanks for your help :)

  7. #7
    Shiari is offline Member
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    Default Re: ASRock Z87 Extreme6 OC issues (UEFI 2.10)

    Since you should be using slots 2 and 4 anyway I think they reach just beyond the heatsink so the clearing shouldn't be a problem ... I can check that when I get home later. You would have to lift the fan, but that shouldn't be an issue I suppose ... the 650D should be plenty wide at least. There's also the option of removing the heatspreaders (or perhaps part of it, if possible), which doesn't affect the ram really.

    As to the adaptive voltage settings, if you want 1.2v then try 1.0 + 0.2 for the settings. I haven't got cache at auto I believe, I've tweaked to go lower while remaining stable. Was some effort though.

    Yeah, input voltage should remain at 1.9V ... it HAS to be at least vcore + 0.4V, and having it a little higher doesn't matter for your temps really.

  8. #8
    Shiari is offline Member
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    Default Re: ASRock Z87 Extreme6 OC issues (UEFI 2.10)

    You can find my latest Intel XTU submitted 4.6 settings here: Shiari`s XTU score: 1073 marks with a Core i7 4770K (click on XTU settings) ... 1.09V / 136mV I used actually.

    Oh and a little side story ... I was playing with settings to see whether I could get 4.7 stable without insane temperatures. I think everything was fine for several days, no crashes or anything, even when running Handbrake and benchmarks. Until a few minutes into a game of Civ 5 ... my 4.7 profiles are on hwbot.org as well. :)

  9. #9
    scorpian007 is offline Junior Member
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    Default Re: ASRock Z87 Extreme6 OC issues (UEFI 2.10)

    I'll try it out tomorrow. My cache voltage is at 1.16v and it runs very stable, don't think changing it will improve things at all so I'll leave it as is.

    Thanks for the help, I'll post back tomorrow to let you know how it goes! Bed time now :)

  10. #10
    Shiari is offline Member
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    Default Re: ASRock Z87 Extreme6 OC issues (UEFI 2.10)

    Just a few quick snapshots, can't do much better than this without pulling the computer out entirely from under the desk. The NH-D14 is a beast, as you're no doubt aware:



    With the front fan removed, you can just about see my RAM only just fits under the heatsink. I believe it would be possible to have the RAM in slot 2 stick out beyond the heatsink, would have to be forced slightly when it's taller than my RAM but that shouldn't really be a problem. My heatsink is also not entirely straight on it would seem, which doesn't help. :)



    The NH-U14S could be an alternative if you're worried about the available space. Here's a review: Noctua NH-U12S and NH-U14S review - Article

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