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Thread: Core i5 oc

  1. #1
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    Core i5 oc

    hello all,

    here is my result with my new core i5 system

    CPU- Core i5 750 2.67GHz
    motherboard - ASUS P7P55D EVO
    memory - PATRIOT XPROJECT 1800MHz CL7
    GPU- LEADTEK GTX 285
    OS - WIN 7

    system pic:










    info:




    SUPER PI stock


    temp on idel (room temp 28-30+-)



    stress test



    CM HYPER TX3 with extra TT fan






    4GHz was easy



    from 4GHz and above the CPU was not stable, only at voltage of 1.53 and up.



    after changes in the skew/voltage i success to reach :



    the max BCLK for now is 207.MHz.



    i am waiting for better cooling, and i hope i will reach more BCLK.

    :
    Intel Core i7-3930K
    ASRock X79 Fatal1ty Champion
    Corsair Vengeance 16GB DDR3-2133MHz
    SAPPHIRE HD6950@HD6970
    HIS HD6970 ICEQ TURBO
    OCZ 1000W Fatal1ty
    COOLER MASTER ATCS 840 BLACK
    Crucial C400/M-4 256GB
    SAMSUNG Spinpoint F3 HD103SJ 1TB
    WD RAPTOR 150GB
    Samsung 2333T
    Logitech WAVE PRO Keyboard
    Logitech MX1100


    Watercool rig

    Swiftech Apogee HD
    EK HD6970 Water Block
    Thermochill PA 120.3 + 6 Scythe GT 1850
    Thermochill PA 120.2 + 4 Scythe GT 1850
    Koolance RP-450X2 - 2X Swiftech MCP655
    ClearFlex Tubing 1/2 ID 3/4 OD
    Lamptron FC-2

  2. #2
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    What diid you change skew to?

  3. #3
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    1.5V needed for over 4GHz? Did you get a dud or something?

  4. #4
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    looks like lga 1175 aren't great in OC'ing, lowest vcore I saw in reviews for i7 860 @ 4GHz was 1.33 ~ 1.35v, seems like lga 1366 oc's better

  5. #5
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    uh, what a crap CPU.....

    i had no i5-750 which was that worse! my best i5 can do 4Ghz @ ~1.29v and 4.1Ghz @ ~1.34v on air stable

  6. #6
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    Quote Originally Posted by phsinc1 View Post
    looks like lga 1175 aren't great in OC'ing, lowest vcore I saw in reviews for i7 860 @ 4GHz was 1.33 ~ 1.35v, seems like lga 1366 oc's better
    I'm not sure why you say that for. As the c0's takes a little more then that to hit 4grz on the i7 920 socket. So if you cut off HT then it is pretty close to being the same.

    Though i would like to see some everest, sandra {memory & cpu scores} and cinebench scores.

  7. #7
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    With i5 the pci-e controller is on the CPU and the freq is tied to the BCLK

    so its not a crap cpu, just poor implementation of the controller (they should have locked it at 100mhz like mobo's do now)

  8. #8
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    Quote Originally Posted by v0dka View Post
    What diid you change skew to?
    i change it to 1300 (CPU SKEW), i start from "normal", then from 300 and on 1300 i have the best stability.

    and yes the cpu was not stable below 1.53 voltage, as well he don't like changes in the PCI-E freq, as it lock on 100, when i change it in 1MHz, the all system crushed.
    :
    Intel Core i7-3930K
    ASRock X79 Fatal1ty Champion
    Corsair Vengeance 16GB DDR3-2133MHz
    SAPPHIRE HD6950@HD6970
    HIS HD6970 ICEQ TURBO
    OCZ 1000W Fatal1ty
    COOLER MASTER ATCS 840 BLACK
    Crucial C400/M-4 256GB
    SAMSUNG Spinpoint F3 HD103SJ 1TB
    WD RAPTOR 150GB
    Samsung 2333T
    Logitech WAVE PRO Keyboard
    Logitech MX1100


    Watercool rig

    Swiftech Apogee HD
    EK HD6970 Water Block
    Thermochill PA 120.3 + 6 Scythe GT 1850
    Thermochill PA 120.2 + 4 Scythe GT 1850
    Koolance RP-450X2 - 2X Swiftech MCP655
    ClearFlex Tubing 1/2 ID 3/4 OD
    Lamptron FC-2

  9. #9
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    Quote Originally Posted by Wildcat293 View Post
    With i5 the pci-e controller is on the CPU and the freq is tied to the BCLK

    so its not a crap cpu, just poor implementation of the controller (they should have locked it at 100mhz like mobo's do now)
    and no way to lock the pci-e?

  10. #10
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    i lock it on 100, as you know in other systems, you can achive more stability with 105+- PCI-E freq, but here nothing, only 100MHz work.
    :
    Intel Core i7-3930K
    ASRock X79 Fatal1ty Champion
    Corsair Vengeance 16GB DDR3-2133MHz
    SAPPHIRE HD6950@HD6970
    HIS HD6970 ICEQ TURBO
    OCZ 1000W Fatal1ty
    COOLER MASTER ATCS 840 BLACK
    Crucial C400/M-4 256GB
    SAMSUNG Spinpoint F3 HD103SJ 1TB
    WD RAPTOR 150GB
    Samsung 2333T
    Logitech WAVE PRO Keyboard
    Logitech MX1100


    Watercool rig

    Swiftech Apogee HD
    EK HD6970 Water Block
    Thermochill PA 120.3 + 6 Scythe GT 1850
    Thermochill PA 120.2 + 4 Scythe GT 1850
    Koolance RP-450X2 - 2X Swiftech MCP655
    ClearFlex Tubing 1/2 ID 3/4 OD
    Lamptron FC-2

  11. #11
    xtreme energy
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    I have a similar batch - 3.8Ghz 1.3V stable but for 4Ghz it needs at least 1.4V
    ...

  12. #12
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    Quote Originally Posted by phsinc1 View Post
    looks like lga 1175 aren't great in OC'ing, lowest vcore I saw in reviews for i7 860 @ 4GHz was 1.33 ~ 1.35v, seems like lga 1366 oc's better
    Isnt it the first rev. of the cpu which usually need more vcore. The second one will need less if there any just like the old rev. change

  13. #13
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    Quote Originally Posted by Sparda View Post
    Isnt it the first rev. of the cpu which usually need more vcore. The second one will need less if there any just like the old rev. change
    The first batch tend to be always pretty good in my experience.

    May be Intel want everyone to think they are great clockers to get the word around.

    ZR30W | 800D | 2600K | MIVE | 580 HydroGen | X25-160 | Aquaero

  14. #14
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    4.36GHz on air cooling is nice for our temperatures in Israel these days.
    Too bad you can't use yet your water cooling for that system. I'm sure you could get some more juice out of it.

  15. #15
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    I think You haven't installed well the Intel's radbox.

  16. #16
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    in first few pics with intel cooler, whats with the fluctuating clock's etc..?
    guessing
    Idle = you had all power saving stuff on then pi = turbo to 3.2 then OCCT = throttled?
    "Cast off your fear. Look forward. Never stand still, retreat and you will age. Hesitate and you will die. SHOUT! My name is…"
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  17. #17
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    Isnt it the first rev. of the cpu which usually need more vcore. The second one will need less if there any just like the old rev. change
    Still PcCI2iminal seems to have a much better 750, quite avesome, almost like DO(see in his thread), soo it's seems that we return to the mith :the "vid".
    The lower..the better..at stock it seems that it runs at 1.104v so 1.104 vid.

  18. #18
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    i5 - 750 Cinebench OC @ 4ghz == Sick_Score

    http://www.elitebastards.com/index.p...7&limitstart=6

    Compare to this thread:

    http://www.xtremesystems.org/forums/...d.php?t=209284

    For us 3D guys; This type of data doesn't make the upgrade decision any easier. Hopefully a bunch of overclocking data comes in the next days and weeks... need to firm up this picture.

  19. #19
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    short oc test with Intel Xeon X3470 (i7-870) and air cooling (ac freezer xtreme)


  20. #20
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    Quote Originally Posted by phsinc1 View Post
    and no way to lock the pci-e?
    sorry not pci-e freq per-se, this explains it pretty well

    http://www.anandtech.com/cpuchipsets...px?i=3634&p=19

  21. #21
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    @ OP, damn high voltage, what were the temps like?

  22. #22
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    Out of curiosity why are you using a PS2 adapter for a USB device with plenty of ports left?

  23. #23
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    Look at this one :

    ***** Visit us on PCWorld.fr *****

  24. #24
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    short 32M test on air (AC Freezer Xtreme) w/o tweaks


  25. #25
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    thats an absolutely frightening amount of voltage.
    ASUS P8Z77-V PRO
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