OCing my i7-2600k

This is a discussion on OCing my i7-2600k within the Intel forums, part of the Technology category; Hi all, I managed to use Asus AI Suite II to AutoTune to almost 4.9GHZ...did not boot as it told me OC failed. I then ...

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  1. #1
    Newbie R.O.G.N.I.C.'s Avatar
    Join Date
    May 2011

    OCing my i7-2600k

    Hi all,

    I managed to use Asus AI Suite II to AutoTune to almost 4.9GHZ...did not boot as it told me OC failed. I then changed the CPU voltage at 1.375 and my PC is now working.

    I am not done with this PC OC, but I will try to get this running at 5.0 at low voltage as I can before I do stress tests.

    But here is the thing:

    AutoTune (if I set it) just over 4.83 with 1.45v it will work just fine, but my temps will jump well over 80 in less than 10 minutes in Prime95
    Now, forget about p95 and any other stress test or benchmarking tools, and focus on winRAR bench for a moment.

    If I run WinRAR bench with this setup I will get the score over 6.2k
    However, if I lower the volts it will run just over 4.2k...now 4.2k will be the same if I run at stock 3.4 or turbo with it at 3.8...it will be the same bench.

    So I guess my question is:

    What makes the difference in benchmarking? Does it have to do with voltage or speed it is running at?



    CORSAIR HX Series CMPSU-1000HX 1000W

    EVGA 01G-P3-1373-TR GeForce GTX 460

    Intel Core i7-2600K Sandy Bridge 3.4GHz (3.8GHz Turbo Boost)

    CORSAIR XMS 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 2000 (PC3 16000) Desktop Memory Model CMX8GX3M2A2000C9

    Seagate Barracuda XT ST32000641AS 2TB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive -Bare Drive

    Noctua NH-D14 120mm & 140mm SSO CPU Cooler

    P.S. I am running RAM at stock and it is at 1066 (but it is 2k ram).

    P.S.S. Also CPU-Z can read changes on my CPU speeds, but CoreTemp nor SpeedFan nor RealTemp can. For instance, if I am at 4.8 it will show, but when CPU-Z shows that is at 1.6 (low) the rest of the programs will be 3.4, 3.5, and something like 4.2. Not sure if this is because of the new chip and programs not updating properly?

    I just want to be able to get 5.0 24/7 stable if my CPU can do it with max of 80c on full 100% load. I do not mind staying at 4.8-5.0 as long as I am useing that OC to the "needed" max potential (look at the example of WinRAR test). Also I did a run at 4.9 (with autotune) by useinf Linx and got like 59k, now with 4.8 and 1.375 it's only 39k...I do not understand this part. Could someone explain it to me plz.

    Please do not hate me as this is my 1st post. I also was reading:



  2. #2
    TR Staff Neuromancer's Avatar
    Join Date
    Apr 2009
    South Jersey
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    Intel has been making products lately that will boot and operate despite being wildly incapable of doing so (it may have something to do with Win7 as well). Dunno how, but I could boot X58 with 1 dead stick of RAM. P67 I can boot and even run wPrime at .05 less volts than any other application needs for stability.

    that being said, reducing voltage (not clocks) and getting a lower score is a perfect example of instability. 5GHz 24/7 is a lot to ask, especially with the mercury rising.

    Another thing to consider is that what people post as their "24/7" voltages are often wrong, not saying they are all lying, although I suspect some are, but its a matter of not truly being stable or not knowing how to read voltages.

    Trusting software to read voltages is like trusting it to read temperatures. (Its good enough for casual use, but usely fairly inaccurate) and on SandyB most of the stress testing software is no longer appropriate. (In my limited experience)

    PS: RAM should be running at least 1866 MHz on an OCed SandyB setup. Faster is better, but 1866 was the last BIG performance jump for memory speed. You may need to adjust VTT (Vccio) a bit to run faster when OCed so far.

    PSS CPUz is updated very often, and sandy B needs updated software. If you want to use realtemp look for v 3.67 it's a beta but is designed for it IIRC (thought it was 3.65)
    Last edited by Neuromancer; 05-27-2011 at 02:15 PM.
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  3. #3
    Newbie R.O.G.N.I.C.'s Avatar
    Join Date
    May 2011
    Thank you very much for the reply. As for 24/7 use...I just need a stable PC to run at that speed. What I am trying to say, I do not need it 24h a day 7 days a week, but when I do want to play games I do not want it to crash on me. It will be turned off over night 99% of the time.

  4. #4
    Newbie R.O.G.N.I.C.'s Avatar
    Join Date
    May 2011
    Now in short....

    1. I was getting a much better persofmance in WinRAR with 4.8 at high vcore (1.475), and my cpu temps easy over 90c.

    2. Now at 5.0 I can do IBT with no problem, and my temps will be 74 MAX, but that is like 5% of the time if not less.

    3. How can I with a stable PC atm make is come close to 6.250k in WinRAR that I had before?
    4. With Linx I am now I am getting 42.5k from 59k at 4.8 before!

    I just do not understand how this is performed? Does my RAM play difference? I was running it at almost 2000Mgz when I autotuned it with autotune.


    P.S. How do I add other attachments so that they look the same as first one and not a low rez?
    Attached Images Attached Images
    Last edited by R.O.G.N.I.C.; 05-27-2011 at 04:00 PM.



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