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OC i7 920 help

Discussion in 'Overclocking & Cooling' started by hat, Aug 1, 2012.

  1. hat

    hat Enthusiast

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    Trying to get my i7 920 to 4GHz. Currently I have all voltages at stock, other than CPU vcore, which I have been slowly pushing up, at 1.25v right now. I'm trying to run 200x20, as 200 will give me 1600mhz mem, which will be useful when I get a new ram kit.

    So right now all I'm doing is raising cpu vcore one notch up when I fail a test. Is 200 bclk very high? Should I need voltages in other areas at this point?
     
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  2. DOM

    DOM

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    Has it failed ?

    I found it put more stress on the cpu when you oc them mem high which needed more vcore and nb volt Ich something like that been a while since I used 1366 XD

    But with 1600 it should be fine at stock on the other volts
     
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  3. hat

    hat Enthusiast

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    Don't have the 1600 mem yet, using a 1333 kit. Mem is well below 1333, trying to isolate the cpu core and get to 4GHz. It's failed a lot, just failed at 1.275v. All I'm doing is raising bclk for the cpu core, everything else is low. I'm thinking 200 bclk might be high though, wondering if I need voltage somewhere else.
     
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  4. DOM

    DOM

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    That's the extreme mb right ?

    What is your qpi, ioh,ich, volts at ?
     
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  5. Outback Bronze

    Outback Bronze

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    Yes increase your qpi/vtt to 1.3-4. This will help out a bit. Also vcore should be around 1.3. See how u go with that. Report back if any issues.
     
  6. Tatty_One

    Tatty_One Super Moderator Staff Member

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    I am running a C0 @ 4.1gig 24/7 on 1.265V. Firstly sack the 20x multi and go turbo @ 21x, that will lower your BClock and give you much more room to tweak, I always try to set my QPI volts say 2 increments above my Vcore unless I am going extreme. Some apps actually perform better with Turbo enabled.

    Whilst I appreciate that by going turbo you will lower your ram speed, you can always just invoke xmp to give you the memory speed once you have bought your new stuff. Also keep an eye on your uncore multi, some boards don't like uncore going to high and this in iteslf will cause instability.

    Having said all that, we all have our preferred way of doing things, I have just found this way gives me the better results, especially when pushing for benching, the extra multi helps at the top end, although many boards can do 220BClk, some won't stabily.
     
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  7. hat

    hat Enthusiast

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    Well, 3.8GHz @ 190x20 passed 12 hours of linpack at 1.25v, no other voltages raised. I really want that 200 clock for the mem though. Maybe I'll try 200x19 later. This gives me the same cpu core speed, so if something goes haywire I can blame the bclk and try figuring out what voltage needs raised.
     
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