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Thread: Core i7 Overclocking by Batch #

  1. #276
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    Too small a sample to make this sort of conclusion, imho
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  2. #277
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    Core i7 920 3836A874

    Gigabyte EX58-UD5 F5
    21x191
    1.325 bios - 1.296 idle / 1.280 load

    http://forum.crazypc.ro/attachment.p...3&d=1232561232

  3. #278
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    Quote Originally Posted by ChaosAD View Post
    According to cky2k6 spreadsheet it seems that batch B clocks better with less volt. Am i right or do i miss something?
    This was a very early on assumption of the i7's but about around a month ago, people were also finding that 36A's and 41A's were also great clockers with low voltage.

    3836B043 is a chip I and another person on this forum has, and they are not that great as the earlier B chips.

    UPDATE: my chip is now stable @ previously posted settings but @ 182x21 for a final clock of 3822mhz @ the same voltages of 1.27v
    I have not tried further lol....
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  4. #279
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    920 #3836A394

    Intel Core i7 920 D0 @ 4.2GHz HT On #3844A716
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  5. #280
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    Quote Originally Posted by Andryke View Post
    Core i7 920 3836A874

    Gigabyte EX58-UD5 F5
    21x191
    1.325 bios - 1.296 idle / 1.280 load

    http://forum.crazypc.ro/attachment.p...3&d=1232561232
    What cooler are you using and any other voltage adjustments or just vcore?
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  6. #281
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    Quote Originally Posted by GenTarkin View Post
    3836B043 is a chip I and another person on this forum has, and they are not that great as the earlier B chips.
    I think you are wrong, I'm running this chip at 4ghz with 1.31vcore, so it's an excellent oc'er, imho.
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  7. #282
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    Quote Originally Posted by GenTarkin View Post
    What cooler are you using and any other voltage adjustments or just vcore?
    CM Z600 + 2x120mm Antec TriCool ( ambient @ 23C )
    QPI/VTT : 1.375V
    IOH : Auto
    DDR : Doesn't matter
    CPU PLL : 1.86V

    I haven't tried with lower VTT/PLL voltages, when i'll have some spare time i'll test that too.

    Cheers

  8. #283
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    I picked up a 3841A437 tonight. I only see one other 384 on this thread and it took 1.4v to do 4ghz... is this a fairly new batch or something?
    Intel Core i7 920 #3841A437 @ 3.8ghz 1.26v HT off
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  9. #284
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    Quote Originally Posted by anzial View Post
    I think you are wrong, I'm running this chip at 4ghz with 1.31vcore, so it's an excellent oc'er, imho.
    Really? what are your voltages in bios? and uncore/mem settings?
    Thanks
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  10. #285
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    QPI is 1.3v, CPU PLL 1.8, CPU VTT is 1.36, and CPU itself shows as 1.312 in cpu-z (not sure if I can believe it, since it does not change from idle to load, although rarely under load it drops momentarily to 1.296). I have a biostar mobo and vcore is only set relative to some value, don't know what that is, probably stock voltage or something, in my case it takes +0.08v. For the same reason, I don't have any control over uncore, according to memset it's 16x, and memory I keep at 2:8, all automatic timings, 1.64vimm. Last, and most important, cpu is at 21x and 191bclk, and not 200x20, the latter is completely unstable. Hope this will help you to oc' your cpu to 4ghz as well
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  11. #286
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    Ok, the best i can is 19x200 @ 1.28v core and 1.28 qpi voltage. Everything else is auto.

    Is there any way to get lower vcores? I mean, with what settings can i compensate a lower vcore? I see people getting 3.8 with vcore values lower than 1.28 but at the same time i'm really noob at Oc'ing so i don't know what settings to change in order to compensate lower vcore values.

    My Batch # 3839A569 and i'm using a P6T Deluxe with latest bios ( 1102 ) and 6Gb of Dominators 1600 (C8 ).




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  12. #287
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    Quote Originally Posted by DamienKC View Post
    I picked up a 3841A437 tonight. I only see one other 384 on this thread and it took 1.4v to do 4ghz... is this a fairly new batch or something?
    where did you get it?
    Intel Core 2 Duo E6400 L625A491 @ 3.2 Ghz 1.36V dual prime stable 25+ hrs large FFTs |
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  13. #288
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    Quote Originally Posted by cambrian View Post
    where did you get it?
    microcenter locally for $230 ;D

    ordering my ram and mobo today, most likely the ones listed in my sig.
    http://www.newegg.com/Product/Produc...82E16820231245
    http://www.newegg.com/Product/Produc...82E16813128375


    they're both light blue and white, too so it'll look nice

    expect some results with my true by next weekend.
    Last edited by Damien; 02-02-2009 at 09:26 AM.
    Intel Core i7 920 #3841A437 @ 3.8ghz 1.26v HT off
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  14. #289
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    3837A904 i7 920
    No HT, and no more than 3400Mhz on the Uncore :/
    These two fonctionnalities of the Nehalem need more than air cooling on the cpu i guess


    Still no HT and still again not more than 3400Mhz uncore:


    This OCcct graph shows the hotest af all cores.
    Last edited by ToyTen; 02-02-2009 at 09:48 AM.
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  15. #290
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    Quote Originally Posted by Damien View Post
    I picked up a 3841A437 tonight. I only see one other 384 on this thread and it took 1.4v to do 4ghz... is this a fairly new batch or something?
    I got three 3841A43x from amazon.com. Amazon charges a little more, but worth it because of their return policy in case you get a weak chip. How did the chips do? All were duds.

  16. #291
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    Quote Originally Posted by roller11 View Post
    I got three 3841A43x from amazon.com. Amazon charges a little more, but worth it because of their return policy in case you get a weak chip. How did the chips do? All were duds.
    I guess we'll have to see

    I tend to get pretty lucky with chips or i know what im doing, i can't really tell. I had one of the best e8400s around (did 4ghz stable damn near stock volts, benched at 4.5, all on air). did you try different motherboards?

    and what is dud by your definition? i'm just wanting a 4ghz 24/7 overclock on around 1.4v tops...
    Intel Core i7 920 #3841A437 @ 3.8ghz 1.26v HT off
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  17. #292
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    Quote Originally Posted by roller11 View Post
    I got three 3841A43x from amazon.com. Amazon charges a little more, but worth it because of their return policy in case you get a weak chip. How did the chips do? All were duds.
    Total bummer. 3841A505 took me up to 3.6Ghz on stock voltage AND cooling. Goes further then that as well, but temps break into the lower 70's under load at that point so I give up there and stay with 3.6 for now.
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  18. #293
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    Here are my first results on a 3836A875 batch. I think it does a damn well job considering that I didn't fiddle around much with the settings. I've everything on some reference voltages and started OC'ing (all within Intel specs). My current max. RAM speed with these voltages and timings is around 1780Mhz. With RAM at 1720 like in screenshot I'm still able to tighten timings and lower some voltages. Voltages used in bios:

    Vcore: 1.35v
    CPU PLL: 1.90v
    QPI/DRAM: 1.35v
    vDRAM: 1.64v
    CPU spread spectrum disabled
    PCIE spread spectrum disabled
    Everything else on AUTO

    HT disabled
    Turbomode disabled



    Quote Originally Posted by Damien View Post
    I picked up a 3841A437 tonight. I only see one other 384 on this thread and it took 1.4v to do 4ghz... is this a fairly new batch or something?
    On Anandtech they told in an article that batch 3835, 3836 and 3841 are the better OC batches. So you could be lucky, I gues.


    CPU: Intel Core i7 920 (4.02Ghz @ 1.35v) (3836A875)
    Mobo: Asus P6T-Deluxe (bios 1701)
    RAM: Corsair TR3X6G1600C8D (1700Mhz @ 8-8-8-24-1T)
    Videocard: Club3D HD7950 RoyalKing 3Gb
    Soundcard: Asus Xonar DGX
    HDD's: 1 x 256Gb Samsung SSD 840 Pro and 3 x 640Gb Samsung F1 Spinpoint
    PSU: Zalman 850W
    Case: Coolermaster CM690

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  19. #294
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    Some jackass decided to screw around with the spreadsheet, so I uploaded the one from my hd again. If it gets messed up again, I just won't bother with this anymore. And for those still posting your results, don't forget to enter it into the spreadsheet if you want it to be included in the list on the front page. http://spreadsheets.google.com/ccc?k..._RqTL5QA&hl=en
    Core i7 920 3849B028 4.2ghz cooled by ek hf | 6gb stt ddr3 2100 | MSI HD6950 cf cooled by ek fc | Evga x58 e760 Classified | 120gb G.Skill Phoenix Pro | Modded Rocketfish case + 1200w toughpower | mcp 655 pump + mcr 320 + black ice pro II

  20. #295
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    Quote Originally Posted by cky2k6 View Post
    Some jackass decided to screw around with the spreadsheet, so I uploaded the one from my hd again. If it gets messed up again, I just won't bother with this anymore. And for those still posting your results, don't forget to enter it into the spreadsheet if you want it to be included in the list on the front page. http://spreadsheets.google.com/ccc?k..._RqTL5QA&hl=en
    added my 3836B to it =)
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  21. #296
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    I want to save but I can't. You need a google account or not? I don't have one, damn it.


    CPU: Intel Core i7 920 (4.02Ghz @ 1.35v) (3836A875)
    Mobo: Asus P6T-Deluxe (bios 1701)
    RAM: Corsair TR3X6G1600C8D (1700Mhz @ 8-8-8-24-1T)
    Videocard: Club3D HD7950 RoyalKing 3Gb
    Soundcard: Asus Xonar DGX
    HDD's: 1 x 256Gb Samsung SSD 840 Pro and 3 x 640Gb Samsung F1 Spinpoint
    PSU: Zalman 850W
    Case: Coolermaster CM690

    D-Tek Fuzion with 5,5mm nozzle | Swiftech MCP655 | Thermochill 120.2 | EK Reservoir | XSPC High Flex 7/16" ID - 10/16" OD | Scythe S-Flex SFF21F Fans

  22. #297
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    Quote Originally Posted by Pisklink View Post
    I want to save but I can't. You need a google account or not? I don't have one, damn it.
    I guess you do, which is pretty weird, since I set the option to let anyone edit without signing in...
    Core i7 920 3849B028 4.2ghz cooled by ek hf | 6gb stt ddr3 2100 | MSI HD6950 cf cooled by ek fc | Evga x58 e760 Classified | 120gb G.Skill Phoenix Pro | Modded Rocketfish case + 1200w toughpower | mcp 655 pump + mcr 320 + black ice pro II

  23. #298
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    Who screwed it up? Lemme at 'em.

    I selfishly want this so I can make an informed buying decision in a few weeks.
    Current Project: City of Light, (sortof) Updated 3/25 - A New Arrival

  24. #299
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    I think I've got a 3836A772. I'll have to look and see to be sure (took a pic, but it's not on this comp). Here is where I am:



    How hot is too hot?

  25. #300
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    Quote Originally Posted by cardnut99668 View Post
    How hot is too hot?
    You're within a good range for benching and stability testing. These chips can take a lot of heat, but I'm personally trying to stay ~75C load for 24/7 use. Right now, this has limited me to 3.6GHz on stock cooling, but once my damn retention clip arrives from the States so that I can hook up my Vendetta 2, I expect I'll be able to do ~4.0GHz with those temps. My chip will do 4.0GHz+ @ ~1.3V load, but my temps were ~90C after an hour of Prime.
    Last edited by YukonTrooper; 02-02-2009 at 09:17 PM.

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