i7 920 C0, how high can it go?

Discussion in 'Die-hard Overclocking & Case Modifications' started by signex, Dec 3, 2013.

  1. Comrade_Jerkov

    Comrade_Jerkov Guest

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    1.42 is ALOT of voltage but those temps are good, but you're underwater so it's understandable.

    My 940 is C0 is stable at 3.81 with 1.26v with around the same temps, but it needs a crap ton more voltage to run at 4ghz. Even then, I'm on air using a V8 cooler so the temps will be too much for me
     
    Last edited: Dec 5, 2013
  2. signex

    signex Ancient Guru

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    Yeah it's set to 1,42 in bios, but CPU-Z says it runs at 1.32-1.35 when im running prime95.

    In reality i won't use the CPU at 100%, would it be safe to go higher+more vcore?

    If it's useless for gaming, i'll just stay at 3,8ghz.
     
  3. Veteran

    Veteran Ancient Guru

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    1.42 under water is ok, i had my 930 on my old Rampage 2 board at 4.4 ht on for over 3 years. My 930 is still running now at 4.2 on this motherboard which aint as good as the Rampage that died. Im not water-cooling the mosfets or chipset either with this board. However the power delivery comes from the mosfets and although my mosfets(vrm's) were water-cooled on my old board i would expect these to fail first on your board before the cpu fails. Never under estimate cooling the mosfets on a high oc on x58 architecture.

    Its different for other architecture like x79 were the old Intel PCH chip which is like the South-bridge of x58 architecture, this is now only used for things like SATA, USB, LAN etc.

    [​IMG]



    Everything else runs through the CPU, that is why you see many highend motherboards now where there are water blocks designed only for the Mosfets and NOT the chipset because its not needed. You wouldn't stick a waterblock on a PCH chip that is only used for SATA,USB,LAN etc.

    Times have changed and its definitely harder to get a high oc on x58 than it is on any other architecture because you have the North-bridge and South-bridge voltages to take into account also ie:Chipset.
    I should find x79 Overclocking a piece of cake compared to x58 when i manage to get my hands on the R4EB.
     
    Last edited: Dec 5, 2013
  4. signex

    signex Ancient Guru

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    Yeah it's the Swiftech H220, it's better then the Corsair H100/110's.
    I have it in Pull config.

    It's set in 1.42v in bios, but CPU-Z says 1.32-1.35v when Prime95 is running.
     

  5. Veteran

    Veteran Ancient Guru

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    You should be fine at 1.42, i think mine was 1.43 but if i was you i wouldn't go any higher than 1.42. As for push pull you will not see any difference unless your using a shroud and even then its about 2 degrees which is a crap trade-off considering how much power extra fans use over the course of say 12 months:)
     
  6. urbangangsta101

    urbangangsta101 Guest

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    This is fine, the voltage will drop due to VDroop. It's within safe specifications. I also had to set my BIOS vcore to the same amount. I take it that Load Line Calibration is off?

    Give it 10x Maximum cycles on IntelBurnTest and see what the heat is like,
    and play a few levels of Crysis 3 (if you have it) on maximum settings to do a proper 'real-life' check for stability...
     
  7. dragomirc

    dragomirc Guest

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    Try this settings for 4.1GHz:
    CPU Ratio Settings....................21
    BCLK Freq................................195
    PCIE freq..................................103
    DRAM ....................................xxx
    UCLK.......................................xxx times 2
    QPI Link...................................xxx times 4

    HT on is ok.
     
  8. signex

    signex Ancient Guru

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    My CPU ratio can't go above 20x. :(
     
  9. dragomirc

    dragomirc Guest

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    Mobo BIOS updated?
    For some reason i7 920 like 21 ratio.
     
  10. SpdyRobi

    SpdyRobi Active Member

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    My spare computer is a 920 CO at 4ghz on air, with the same motherboard, could get you the settings if you want.
     

  11. CrazY_Milojko

    CrazY_Milojko Ancient Guru

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    To OP...

    Core i7-902 C0 here with HT ON curently @ 4.01GHz (21 x 191) fully stabile 24/7 with VCore set to 1.37(something)V or 1.38(something)V (I'm not at home right now and that's why I'm not 100% sure what real VCore numbers are)

    Your Gigabyte GA-X58A-UD5 is slightly better for OC than my GigaByte GA-EX58-DS4.

    Also Swiftech H220 is good chunk better than mine Corsair H70 Core + 2x 120mm fans in push-pull. Expect at least 5 to 10 Celsius degrees lower CPU temp @ full stress with HT on with that Swiftech H220, maybe even more.

    My i7-920 C0 is Golden chip capable for 4.2GHz 24/7 OC with HT ON (if I remember well VCore was 1.39(something)V), I've tested it myself for few weeks in real work and with Prime95 on rig in my specs, not a single problem. Maybe it's capable for even more than 4.2GHz but I'm not interested to r.a.p.e that 920 C0 with HT ON more than 4.2GHz and temps higher than 70 Celsius degrees. At this moment 4.01GHz is more than fine for my GTX660, later I'll probably make a jump for custom cooler R9 290 and clock that i7-920 C0 again to 4.2GHZ HT ON.

    Look at this post and probably you'll find something usefull.

    If I was at your place with that Swiftech H220 anything less than 4GHz won't be good enough for me, but in your case how much OC you can get from that i7-920 C0 really depends only how good that CPU is, especially how far can it go with HT ON. If you don't mind about HT turn it OFF and with less heat and less VCore there is a good chance that Swiftech H220 would drive that i7-920 C0 to 4GHz, maybe even 4.1GHz but don't expect 4.2GHz, especially with HT ON.

    Good luck buddy!
     
    Last edited: Dec 6, 2013
  12. mitzi76

    mitzi76 Guest

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    nice chip there the milojko! and 4.8 ghz on a 920 dragomirc...that's heinous!

    tbh i havent fought much for 4.2ghz. i would be tempted when I get a new gpu..gotta try for another 10fps + o _.
     
  13. signex

    signex Ancient Guru

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    Not sure if i have the latest, i'll update it to the latest.
     
  14. CrazY_Milojko

    CrazY_Milojko Ancient Guru

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    Thanks... My golden one i7-920 C0 is a result of many i7-920 C0 chips that had passed through my hands in early months when only C0 existed, D0 was released few months later if I remember well.

    That dragomirc's i7-920 is DO revision for sure, probably it's runing without HT ON, but sure it is some kind of golden chip also. Great OC result for sure, from 2.66GHz to 4.8GHz: 80% frequency increase, now that is something for respect!
     
  15. Veteran

    Veteran Ancient Guru

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    Is that 4.8 with Phasechange or LN?
     

  16. Straykatt

    Straykatt Guest

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    I picked up my i7 920 in Feb 07 when they came out. Been running since at 1.41v prime 12 hrs gives 80 degrees, no HT.. That's basically 6 years, you should be fine.
     
  17. signex

    signex Ancient Guru

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    Well, my mobo seems to not want 21x multiplier, it keeps reverting back to 20x. :(
     
  18. Veteran

    Veteran Ancient Guru

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    Update to latest bios.
     
  19. Veteran

    Veteran Ancient Guru

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    Thats funny cause the I7 920 was released in November 2008, i remember buying one. How did you get yours in Feb 2007? Do you work for Intel?
     
  20. lucidus

    lucidus Ancient Guru

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    I think he really meant Feb 09 :p
     

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