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Thread: It's me, board or CPU ? i7 2600k OC issues (P67A-UD4-B3)




  1. #11
    Chike is offline Senior Member
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    Default Re: It's me, board or CPU ? i7 2600k OC issues (P67A-UD4-B3)

    May it be actually the low frequency ram?
    I'd try running it at 1600 9-9-9-27, or 1333 CL7 at stock and then see if this changes anything.

  2. #12
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    Default Re: It's me, board or CPU ? i7 2600k OC issues (P67A-UD4-B3)

    Quote Originally Posted by wazza300 View Post
    Maybe uncore freq is locked out on that mb,same as p55 which won't help your oc
    What i meant that P67 doesn't have such setting at all. Not even the super highend (P67A-UD7-B3, nothing in manual about it). Will try Ctrl+F1 on next reboot, but for now i keep the OCCT Linpack running (at 1 hour now).

    Quote Originally Posted by Chike View Post
    May it be actually the low frequency ram?
    I'd try running it at 1600 9-9-9-27, or 1333 CL7 at stock and then see if this changes anything.
    1333CL7 or CL9 made no difference. And why should it do any difference, memory frequency is decoupled from the CPU clock.
    Core i7 2600K@4.6GHz Gainward GTX570 Phantom Gigabyte GA-P67A-UD4-B3 GSkill RipjawsX 2x4GB DDR3-1333CL7 Prolimatech Mega Shadow Patriot Torqx 128GB Fractal Design Define R3 Arctic White Corsair AX750 X-Fi Titanium Enermax Aurora Razer DeathAdder W7 Home Premium 64-bit HP LP2475w + Benq T2210HD

  3. #13
    Chike is offline Senior Member
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    Default Re: It's me, board or CPU ? i7 2600k OC issues (P67A-UD4-B3)

    Quote Originally Posted by faugusztin View Post
    And why should it do any difference, memory frequency is decoupled from the CPU clock.
    I don't know, why should you change VCCIO(QPI/VTT), the system bus frequency don't change either.

    Actually there are other settings, usually not needed. Some say not to change them, others do, and I have seen a few setting them much higher than specs, though I would strongly recommand against it.

    VCCSA, default 0.925v, max 0.971v.
    CPU PLL, default 1.8v, max 1.89v.

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    Default Re: It's me, board or CPU ? i7 2600k OC issues (P67A-UD4-B3)

    So it seems so far that with 1.24V@QPI/VTT and 1.4V@VCore, 4.6GHz seems stable (close to 3 hours of Linpack now). Will let it run while i will be away, if it will be still running when i get back (~4 hours from now) i will call this stable @ 4.6GHz. Better than 4.3GHz, but somehow i doubt i will get it higher than this.
    Core i7 2600K@4.6GHz Gainward GTX570 Phantom Gigabyte GA-P67A-UD4-B3 GSkill RipjawsX 2x4GB DDR3-1333CL7 Prolimatech Mega Shadow Patriot Torqx 128GB Fractal Design Define R3 Arctic White Corsair AX750 X-Fi Titanium Enermax Aurora Razer DeathAdder W7 Home Premium 64-bit HP LP2475w + Benq T2210HD

  5. #15
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    Default Re: It's me, board or CPU ? i7 2600k OC issues (P67A-UD4-B3)

    Nice to see you are making progress!

    Also surprising to see you can use QPI/Vtt 1.24, the two CPU's I have used hate more than 1.20 and one actually likes stock or 1.08 no matter what, even at 5Ghz+ and 2170+

  6. #16
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    Default Re: It's me, board or CPU ? i7 2600k OC issues (P67A-UD4-B3)

    Right now i'm running at VCore @ Normal (1.36V) + Dynamic Voltage (DVID) at +0.5V (1.404V low load, 1.392V high load); Vtt @ 1.2V; System Agent @ 0.945V (going to return it after few hours running test); DRAM Voltage @ 1.56V (going to lower it back to 1.5V after few hours too).

    But i think the major difference is turning C3/C6 suport off, while keeping EIST/C1E and everything else enabled (except turbo of course). The result of this is that CPU doesn't lower the Core voltage to some mid-values when there is only an average load (like 25% in OCCT Linpack when the task ends and the nest one didn't started yet) - so no crazy 1.29V voltage where it crashed every time.

    Now i'm at 16 minutes of OCCT Linpack with power saving features enabled, while other times it couldn't last even 10 minutes with power saving enabled at 4.6GHz.
    Core i7 2600K@4.6GHz Gainward GTX570 Phantom Gigabyte GA-P67A-UD4-B3 GSkill RipjawsX 2x4GB DDR3-1333CL7 Prolimatech Mega Shadow Patriot Torqx 128GB Fractal Design Define R3 Arctic White Corsair AX750 X-Fi Titanium Enermax Aurora Razer DeathAdder W7 Home Premium 64-bit HP LP2475w + Benq T2210HD

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  8. #18
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    Default Re: It's me, board or CPU ? i7 2600k OC issues (P67A-UD4-B3)

    Seems like Gigabyte posted the F2 BIOS for my board :
    GIGABYTE - Motherboard - Socket 1155 - GA-P67A-UD4-B3 (rev. 1.1)

    It is 8 days newer than my F1 BIOS (14th Feb 2011 vs 22nd Feb 2011), but "First Release" label doesn't really help much about what features/fixes it have over my current F1 BIOS.
    Core i7 2600K@4.6GHz Gainward GTX570 Phantom Gigabyte GA-P67A-UD4-B3 GSkill RipjawsX 2x4GB DDR3-1333CL7 Prolimatech Mega Shadow Patriot Torqx 128GB Fractal Design Define R3 Arctic White Corsair AX750 X-Fi Titanium Enermax Aurora Razer DeathAdder W7 Home Premium 64-bit HP LP2475w + Benq T2210HD

  9. #19
    Lsdmeasap's Avatar
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    Default Re: It's me, board or CPU ? i7 2600k OC issues (P67A-UD4-B3)

    They often do not mention what fixes or improvements are made unless they are major items.

    I'd go ahead and use it for sure over F1

  10. #20
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    Default Re: It's me, board or CPU ? i7 2600k OC issues (P67A-UD4-B3)

    Was I the only one that spat my drink all over my monitor when I read that OP was running:

    (close to 3 hours of Linpack now). Will let it run while i will be away, if it will be still running when i get back (~4 hours from now)
    That's a completely ridiculious amount of time to run Linpak for. I'm surprised OP's CPU isn't a charred mess.

    Using LinX and ~5 runs can give a pretty good idea of stability, and takes ~10-15 minutes.
    Last edited by Psycho101; 03-20-2011 at 02:25 AM.
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