did you turn off speed step and all that junk?
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On a P45 board, I needed 1.26v to the northbridge to get 3.4GHz. What northbridge voltage are you running on your P43 board?
Originally Posted by burningstar4 This is my first experience overclocking, but I've managed to get my Q6600 settled at 3285 MHz (365x9)with 1.38v Vcore. Everything seemed stable enough until I tried running a Blend torture test in Prime95--it fails after about 10 minutes. I have the RAM at 1:1 with the FSB (730 MHz) @ 2.08v, so I tried loosening the timings from 5-5-5-12 to 5-5-5-15, and still no luck getting it stable. Does anyone have any suggestions as to what I could try to get this to work? |
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I'm running at only 1.18v right now, I hadn't thought of increasing that. I'll give that a shot as well and report back.
Originally Posted by ericeod On a P45 board, I needed 1.26v to the northbridge to get 3.4GHz. What northbridge voltage are you running on your P43 board? |
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Quads put more stress on the NB and do require more voltage then the dual cores. You shouldnt need to go over 1.3v with this chipset series (P45 or P43).
Originally Posted by burningstar4 I'm running at only 1.18v right now, I hadn't thought of increasing that. I'll give that a shot as well and report back. |
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That sounds like stock voltage, and that's probably not enough haha. I think you've found your problem.
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I need 1.34v to be stable at my OC. Maybe the 4 sticks of RAM make it necessary to have a tiny bit more vNB to be stable?
Originally Posted by burningstar4 I'm running at only 1.18v right now, I hadn't thought of increasing that. I'll give that a shot as well and report back. |
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Originally Posted by ericeod Quads put more stress on the NB and do require more voltage then the dual cores. You shouldnt need to go over 1.3v with this chipset series (P45 or P43). |
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Yeah they do. Its not as bad as it was on the NVIDIA 600i series. 4 modules on my old 680i caused a lot of problems.
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There are no FSB holes on Intel chipsets. NVIDIA has them because of the myriad of memory dividers. The unlinked memory function actually still uses dividers, the bios just picks one of many to run the ram as close as you set manually. Intel only uses a handful of very stable dividers, so there is less of a selection, but no chance for a divider that is mismatched with the chipset latency.
Originally Posted by ljason8eg That sounds like stock voltage, and that's probably not enough haha. I think you've found your problem. I need 1.34v to be stable at my OC. Maybe the 4 sticks of RAM make it necessary to have a tiny bit more vNB to be stable? |
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Originally Posted by Hobo Bob My Mobo had a FSB hole at 1422-1550 and it would not be stable even with 1.5v! But i jumped it to 1600Mhz FSb (3.6Ghz) and it was stable, so try that! |
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You have an NF chipset. Intel chipsets don't get these "holes" like nvidia chipsets.
Originally Posted by Hobo Bob My Mobo had a FSB hole at 1422-1550 and it would not be stable even with 1.5v! But i jumped it to 1600Mhz FSb (3.6Ghz) and it was stable, so try that! |
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Its not your VTT, that is the FSB termination voltage. The northbridge will eith be something like "NB voltage", "G(MCH) voltage" or "MCH voltage". If you can take a picture of your bios voltage settings, it would help.
Try upping it by +.20v, that should set it to 1.3v to the NB (the default is 1.10v on these chipsets).
Originally Posted by burningstar4 In my BIOS, I upped the Chipset Voltage by 0.10v and the VTT by 0.10v. However, my hardware monitor still reports that NB voltage as 1.18v. I'm running Prime95 now to see if the VTT increase did the trick, but I'm not quite sure how I would adjust the North Bridge voltage. |
Try upping it by +.20v, that should set it to 1.3v to the NB (the default is 1.10v on these chipsets).
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Ha ha...
I think he probably had it on auto, which set it to around 1.18v. Then when he increased it by +0.10v, it put it about were it was previously. And we know how Auto voltages can be unreliable
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Originally Posted by spacegoast NB voltage is also called MCH, so look for that in your BIOS if you cant find NB votlage. edit: you just beat me to it Eric. |
I think he probably had it on auto, which set it to around 1.18v. Then when he increased it by +0.10v, it put it about were it was previously. And we know how Auto voltages can be unreliable
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It was on auto before. Actually, I don't know why I didn't think of that, I had the same issue with my Vcore setting but figured it out earlier today. I'll give that a try, as well.
Originally Posted by ericeod I think he probably had it on auto, which set it to around 1.18v. Then when he increased it by +0.10v, it put it aboput were it was previously. And we know how Auto voltages can be unreliable
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Ya Im guessing he just switched something else, thinking it was the NB voltage. Auto sets it to what it thinks would be appropriate and that of course rarely ever works out for the user.
Originally Posted by ericeod Ha ha... I think he probably had it on auto, which set it to around 1.18v. Then when he increased it by +0.10v, it put it aboput were it was previously. And we know how Auto voltages can be unreliable
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I did, and it worked! NB voltage is now reported as 1.28v, so now I'm just waiting for Prime95 to run a while and see if everything's stable. Thanks so much for all the help!
edit: Prime95 errored after 19 minutes, so still not quite there.
Originally Posted by ericeod Try upping it by +.20v, that should set it to 1.3v to the NB (the default is 1.10v on these chipsets). |
edit: Prime95 errored after 19 minutes, so still not quite there.
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Hey no problem. You did all the work, I just threw some ideas at you! Now you need to play with GTL Ref voltages (hopefully there are some settings in your bios). Something around x.63 should work for you. Also increase your VTT closer to 1.34v and see about maybe adding a little vcore to the Q6600.
Originally Posted by burningstar4 I did, and it worked! NB voltage is now reported as 1.28v, so now I'm just waiting for Prime95 to run a while and see if everything's stable. Thanks so much for all the help! edit: Prime95 errored after 19 minutes, so still not quite there. |
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