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Thread: OC'ing Guide for the Z97 Extreme6/4790K?




  1. #21
    Ken429 is offline Senior Member
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    Default Re: OC'ing Guide for the Z97 Extreme6/4790K?

    godto,
    Must be a typing error 1.85v don't make sense?! I am happy @ 4.6GHz @ ~1.21V under load and core temps ~60C under load.

  2. #22

    Default Re: OC'ing Guide for the Z97 Extreme6/4790K?

    no it 1.185 .... oppsss typo .. sorry

    wow your temp are so low ...

    dam what did i do wrong
    Last edited by godto; 08-03-2014 at 10:23 AM.

  3. #23
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    Default Re: OC'ing Guide for the Z97 Extreme6/4790K?

    Quote Originally Posted by godto View Post
    what you guy think of my OC?

    I'm now stable at 4.5 with fix 1.185v ( offset -.005)

    temp max on all tress test 4 to 8 hours depend on test
    prime95 small = 83c
    OCCT small = 83c
    IBT standard = 86c ( always hotter)
    IntellExtremeUlti = 72c
    Aida = 78c

    funny thing is my vcore is 1.185v and input voltage only 1.776v
    but my temp is still so high

    my question is do you think this Ok for 24/7 or i should lower to 4.4 ?
    yeah also... i read in few places that after OC is good and stable then i can turn on Adaptive voltage.
    will adaptive mess up my OC?
    That's a great OC for Haswell, 4.5GHz at 1.185V, and given the stress test temperatures you get.

    I know, how can those temps be considered great given the your Noctua CPU cooler? Welcome to the world of Haswell processors!

    You probably know all this, but to review, every Intel "Mainstream" desktop processor (all Intel processors except those that use socket 2011 and the x79 chipset, the 'E' processors) released after the Sandy Bridge generation (i3, i5, and i7 2xxx family) do not use solder between the CPU die and the IHS. Instead they use TIM and the IHS is glued on. That highly compromises the heat transfer to the IHS and then to the CPU cooler. Actually, that just includes Ivy Bridge and Haswell.

    Then add the on-CPU package voltage regulators used in Haswell CPUs, and they run hotter than usual when over clocked. Ken429 is using custom water cooling, the only way to get the temps that he does, besides delidding. You can't compare an air cooler to that, right?

    I love your low CPU input voltage, most people use more than they need. Intel specs CPU input as 0.4V above the maximum VID/VCore, below that will cause instability. The acceptable range is 0.4V to 0.6V above the maximum VID/VCore. Above 0.6V will cause unnecessary stress and wear on the Haswell voltage regulators, according to Intel. Many users ignore that last spec, just like the 1.5V max DRAM voltage. If you don't need 1.9V for CPU Input, why use it?

    My little Pentium G3258 does 4.0GHz at 1.12V, CPU Input Voltage set to 1.520, max stress test temps of ~57C. That cracks me up, I love it!!!!

    OC'ing Guide for the Z97 Extreme6/4790K?-g3258-hwinfo-2-png

  4. #24

    Default Re: OC'ing Guide for the Z97 Extreme6/4790K?

    it took me 4 day to get that voltage .. some time I'm only up .003v and the worst part is they only felt at 3 or 4 hours. most peoples don't stress test that long on occt small.

    but my patient pay off ... just wish the temp max under stress is under 80. but 86 max max on IBT is not bad... IBT max only 2 more degree higher.

    thanks for your opinion.

    i guess i will keep this ... hope it won't degrade my chip.

  5. #25
    Ken429 is offline Senior Member
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    Default Re: OC'ing Guide for the Z97 Extreme6/4790K?

    I'm cheating on the maximum core temps. I don't run IBT or Prime95 or AIDA64 with Stress FPU checked and the ambient temperature is ~70F. By comparison the 3770K sitting next to the 4790K hits 83C when running IBT. The 3770K has a slightly better cooling setup than the 4790K. When I run ROG's RealBench V2.2 on the two systems the results are:

    3770K @4.5GHz ~1.30V Under Load (Offset Method) - Maximum Core Temp 71F and the Benchmark Score is 72,952

    4790K @4.6GHz ~1.21V Under Load (Adaptive Method) - Maximum Core Temp 61C and the Benchmark Score is 83,516

    AIDA's Stress Test comes in a little lower at ~66C on the 3770K and about the same ~60C on the 4790K.

    So...based on my VERY unofficial and limited testing it looks like I get more bang for the Volt on the 4790K and it took little effort to get there.
    Last edited by Ken429; 08-04-2014 at 02:05 AM.

  6. #26
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    Default Re: OC'ing Guide for the Z97 Extreme6/4790K?

    Quote Originally Posted by Ken429 View Post
    I'm cheating on the maximum core temps. I don't run IBT or Prime95 or AIDA64 with Stress FPU checked and the ambient temperature is ~70C. By comparison the 3770K sitting next to the 4790K hits 83C when running IBT. The 3770K has a slightly better cooling setup than the 4790K. When I run ROG's RealBench V2.2 on the two systems the results are:

    3770K @4.5GHz ~1.30V Under Load (Offset Method) - Maximum Core Temp 71C and the Benchmark Score is 72,952

    4790K @4.6GHz ~1.21V Under Load (Adaptive Method) - Maximum Core Temp 61C and the Benchmark Score is 83,516

    AIDA's Stress Test comes in a little lower at ~66C on the 3770K and about the same ~60C on the 4790K.

    So...based on my VERY unofficial and limited testing it looks like I get more bang for the Volt on the 4790K and it took little effort to get there.
    WOW, the ambient temperature is ~70C, that's 158F! It's hot in Indiana this year... I'm in Illinois, and we are no where near that! Your cooling is working great!

    Sorry, could not resist.

    It seems you are a fan of Adaptive voltage with a negative offset now, as I am. So much for a small difference in performance between an Ivy Bridge and Haswell processor, even if the OC is not quite identical. That's over a 10% difference.

    Do you have all the C States enabled in the BIOS, and adjusted the CPU minimum speed in your Windows Power Plan? That will cause the low CPU speed, idle temps, and power usage to be very low at idle. To bad we only get VIDs on ASRock boards, but you'd probably be shocked by the very low VCore I see reported on other boards.

    Or are you a pedal to the metal all the time kind of guy?

  7. #27
    Ken429 is offline Senior Member
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    Default Re: OC'ing Guide for the Z97 Extreme6/4790K?

    Quote Originally Posted by parsec View Post
    WOW, the ambient temperature is ~70C, that's 158F! It's hot in Indiana this year... I'm in Illinois, and we are no where near that! Your cooling is working great!

    Sorry, could not resist.

    It seems you are a fan of Adaptive voltage with a negative offset now, as I am. So much for a small difference in performance between an Ivy Bridge and Haswell processor, even if the OC is not quite identical. That's over a 10% difference.

    Do you have all the C States enabled in the BIOS, and adjusted the CPU minimum speed in your Windows Power Plan? That will cause the low CPU speed, idle temps, and power usage to be very low at idle. To bad we only get VIDs on ASRock boards, but you'd probably be shocked by the very low VCore I see reported on other boards.

    Or are you a pedal to the metal all the time kind of guy?
    Just checking to see if people read this stuff carefully! I fixed it.

    I have left all the Advanced/CPU Configuration settings on default. That is Enabled, All, Auto..., and Package C State Support is Disabled.

    I looked in the Power Options Processor power management>Minimum processor state and both On Battery and Plugged in are set at 5%. Again, those were the defaults. Should I be looking for something else?

    No, I'm basically cheap when it comes to power consumption. I automatically turn the in-house server off at 8PM and back on again at 4AM to try and save a couple dollars per year. In fact, the power consumption on the newer processors and SSD's have me thinking I want to upgrade the old server to a Haswell and use all SSD storage! Spend a thousand to save $100 per year - but then it's a hobby!

  8. #28
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    Default Re: OC'ing Guide for the Z97 Extreme6/4790K?

    As I recall, Auto settings for C States do not enable them, but I could be wrong. I enable all of them, including Package support.

    I set the minimum CPU state to 0%, but I don't think it does anything more than using 5% does. Nothing else in there related to CPU power usage. But I can tell you that the CPU settings can have a large impact with Haswell processors, setting the minimum to 100% will cause the CPU speed to never drop at all.

    If you installed the Intel IRST driver, there are two power settings you can change in the IRST Windows UI, assuming you have Dynamic Storage Accelerator enabled in the BIOS. DSA is a performance option that also affects power usage.

  9. #29

    Default Re: OC'ing Guide for the Z97 Extreme6/4790K?

    this is my temp and voltage
    my ambient was about 30-34c ( damn hot the whole week)
    and my voltage is fix ... I'm under 1.2v but my damn temp is above 80 in stress ...

    but if my ambient is 30c-34c ... and standard is 22c... so 30-22 = 8

    is that mean my temp that is 83c ... I take that and - 8 ....
    83c - 8c = 75c

    this 75c would be my actual and that mean my OC is fine ????

    here some of the pict and voltage of few stress test.

    ** can you take a look to see maybe i missing some thing ? or my voltage is off some where?

    Prime95 - small - 5hours

    <a href="https://www.flickr.com/photos/125579161@N06/14850352283" title="Prim95_26.6_small_5hours by andrew nguyen, on Flickr"><img src="https://farm3.staticflickr.com/2915/14850352283_a3f092683e_s.jpg" width="75" height="75" alt="Prim95_26.6_small_5hours"></a>

    Prime95 - blend - 9hours
    <a href="https://www.flickr.com/photos/125579161@N06/14643966427" title="Prim95_26.6_blend_9hours2 by andrew nguyen, on Flickr"><img src="https://farm4.staticflickr.com/3849/14643966427_7347d33bea_s.jpg" width="75" height="75" alt="Prim95_26.6_blend_9hours2"></a>

    OCCT - small - 6hours

    <a href="https://www.flickr.com/photos/125579161@N06/14828164854" title="OCCT_Small_6hours by andrew nguyen, on Flickr"><img src="https://farm6.staticflickr.com/5582/14828164854_08a9b8e136_s.jpg" width="75" height="75" alt="OCCT_Small_6hours"></a>

    IBT- Standard - 20 run

    <a href="https://www.flickr.com/photos/125579161@N06/14830148522" title="IBT_standar_20 by andrew nguyen, on Flickr"><img src="https://farm4.staticflickr.com/3904/14830148522_a803c72e77_s.jpg" width="75" height="75" alt="IBT_standar_20"></a>

  10. #30
    parsec's Avatar
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    Default Re: OC'ing Guide for the Z97 Extreme6/4790K?

    Ambient/room temperature makes a difference in your CPU temperatures, most if not all temperatures will increase from your baseline ambient temperature, say 22C as you said.

    In the Northern USA where I live, the one good thing about winter is the house is cold, 20C or less in the evening when I back off on the heat. My i7-2600K system with a small CLC cooler, with all CPU power saving options enabled will show 18C or less for core temperatures. So your temperature adjustment of 8C due to the ambient being 30C+ is correct IMO.

    HOW could you be worried or wrong about that OC and voltage? 4.5GHz at 1.18V? That's great! You might find going beyond 4.5GHz will need much more voltage, if you're lucky it won't but don't be surprised or worried if you do, that is typical Haswell behavior. At some point/speed, the voltage needs just increases like crazy.

    My only comment would be IMO the CPU Input voltage at 1.776V could probably be reduced to 1.700V, not that it would cause your temperatures to go down much if at all. If it's not stable with less than 1.776V, leave it there, that's less than most people use at 4.5GHz. IMO, many people use a higher CPU Input voltage than necessary.

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