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Thread: Jay's quest for 4.2

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    Default Jay's quest for 4.2

    Hey eveyone...
    Im trying to get my rig up to 4.2 with turbo and HT and I sure could use some help with the process.
    The following settings ive found to be the most stable so far at 4 so I will use them as a starting point.

    30x133 = 4.0
    turbo and ht = on
    uncore = auto = 3200
    qpi freq = auto = 6.4
    system mem = 12x
    vcore = 1.3875
    qpivtt = 1.355
    dram = 1.5
    dram term, cpupll, pcie, qpipll, ioh core, ich i/o, ich core all auto

    Yesterday i got a brief session at 4.2 but it crashed fairly quickly..
    it was at 30x140, vcore=1.4065, cpupll=1.8, qpipll=1.34 all else on auto

    any more help and input would be greatly appreciated
    thanks

    BTW... NOW IVE FOUND THAT 1.5 STOCK ON THE DRAM IS NOT ENOUGH... 1.66 WAS TOO MUCH AND MADE COD5 CRANKY. SO 1.6 IS GREAT AND ROCK SOLID!
    Last edited by jayfunk; 26-07-2009 at 14:10.

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    turbo sucks, turn it off to allow for more stable overclocks. 4.2 with turbo=4.4 without.

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    jayfunk (18-07-2009)

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    Default

    ok im in!! sign me up for some 4.4 action... how would you go about getting there? ive tried everything and can't seem to find that sweet spot. with unlocked ratios and all the bclks and 5 different voltages there are thousands of possible combinations. whats the process that you guys use to get it up there and stable?
    Last edited by jayfunk; 18-07-2009 at 23:40.

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    Default

    for 4.4ghz, try stock bclk and cpu multiplier x34. get the qpi under 8gt/s if you can. I have used 10gt/s under 1.7v qpi vtt but don't try it as it is NOT stable. since the qpi doesn't really affect cpu temp, i go a bit higher. just don't exceed 1.45v on the qpi and you will not damage your cpu. the uclk should be higher than 3.4ghz. I don't think uclk affects performance that much unless it's set to 2.2ghz. I would avoid tweaking the bclk because its much harder. cpu voltage should probably be higher than 1.43v. make sure you don't fry anything. disable pcie and cpu spread spectrums to get a bit more performance. at this stage set the bios to fix vdroop to avoid running into any stability issues. everything else can probably be left auto. this should be a nice place to start. there should be around a week of testing and tweaking to get the oc stable. i like p95 blend for testing because it stress the fpu and the integrated memory contoller in th cpu. the voltages i specify are still within resonable limits as i have used 1.43v and 1.7v qpi on air and still haven't burn't anything. good luck!!
    *please note that no two computers are exactly the same and just because it doesn't kill my computer does NOT mean that it won't kill yours. (i mean the qpi)

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    jayfunk (19-07-2009)

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    Default

    wow thanks so much for all the great info!!
    I gave it a try and after farting around for about half an hour i got it to start up!!
    33x133=4.4, turbo off ht on, vcore=1.4375, qpivtt=1.415, dram=1.5 and all else auto.
    seems like you were right and that the qpivtt wasnt high enough.

    .. i do have some questions for ya

    1. when do you have to raise the ram voltage? some guys ive seen to have it up to 1.65 but they are not overclocking the ram? in other words do you only have to raise it when youre ram speeds go up past stock?
    2. im going to try prime95 and occt and if it crashes im going to up the qpivtt... if that doesnt work im going to up the vcore one notch and keep doing this until the prime passes?? is this right? how high should i go for the qpi and vcore for everyday medium use? what happens if i cant get the prime to pass then what? again whats the process...
    Last edited by jayfunk; 19-07-2009 at 14:38.

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    1. 1.65v is safe. you raise ram voltage when you oc it. there are two things you can tweak the memory timings and the clock. i don't really like ocing the ram a lot as i'm afraid of killing the cpu's integrated memory controller.

    2. gt/s is simply how fast you qpi link is. it says in the bios when you select your qpi multiplier. it is best to keep it under 8gt/s as there is very little benefit from going any faster (at least on my 4ghz i7). the difference between 7.2gt/s and 10gt/s is around 1 FPS. the qpi vtt can stay at reasonable levels if you don't exceed 8gt/s. i believe 1.45v qpi vtt for 24/7 setup is not that bad but every computer is different.

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    turn off ht. you need a bit more voltage and get slightly lower performance in most apps and games except 3d mark which takes advantage of ht. i think you will get a higher oc without ht if you don't mind higher voltages.

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    ok i tried what you said
    at vcore=1.4375, qpivtt=1.415 it started good and worked but prime failed
    tried upping the qpi to 1.435 and prime seemed to crash worse
    tried upping to vcore=1.44375 and qpi=1.435 and prime showed hardware failures and seemed much worse
    now what do i do?
    it feels like its getting scary hardware failing computer crashing...
    do you mean that with the ht off ill need to up the vcore even more??

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    with ht off the cpu requires lower voltages than a cpu with ht on. ht switched off allows higher stable overclocks.

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    4ghz is for experienced overclockers. 4.2ghz is for experienced overclockers with serious wartercooling. 4.4-4.5ghz is for pro overclockers with extreme cooling. over 4.5ghz is a suicide run with very high voltages (over 1.45v)

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    when ive been overclocking the cpu ive left the ram around stock 1600 and i have never increased the dram since im not overclocking it. i guess that rationale is wrong as you can see on everyones bios settings on here you're all at around 1.6. so ill give that a try. lately i havent been able to play COD5 for more than half an hour or so before it crashes (same as before with black screen and power button not working) and im hoping its because the dram isnt high enough. knock on wood....

    btw here are two things ive heard about the uncore and the qpi lets see if anyone wants to comment..
    1. set uncore at least twice mem speed.
    2. THEN set qpi as low as possible but should be higher than uncore (8:9 ratio between these two)

    does anyone else here manually set these values or do you leave it stock auto?
    Last edited by jayfunk; 23-07-2009 at 09:49.

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    well i set ALL values manually because the voltages are affected by the clocks. 1.65 is stock voltage for i7 i believe?

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    No, 1.65V is the maximum recommended. Stock is more like 1.5V I believe. You can go higher than 1.65V but there are some special "rules" that need to be met and things can get pretty tricky.

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    i heard ram voltage must remain with 0.5v of the qpi vtt. don't know why but i don't go over 1.7v.

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    Sky's right 1.5v is stock setting, 1.65v is the max recommended, you can go over, but you do risk damage to your processor. I believe the highest I've seen was was 1.7v but this system was set up for extreme cooling.

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    hit 4.4ghz?

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