iskout Posted February 28, 2011 Posted February 28, 2011 So, I've been running my E8400 at 4GHz for about 2 weeks. It's prime95 24hours stable, and I haven't had any issues with it thus far. Voltages are almost all stock, except the VCore which is 1.29v. I have it running 24/7 at this frequency (temps are nice and cool- 30C idle, 44C load), but I wanted to bump it and see what I could get it to do. Unfortunately, I noticed immediately that even as high as 1.35v, I can't get anything past 4.05GHz stable. At 1.35v I get an almost immediate fail of prime95. 1.32 I get a BSOD during boot. 1.30 doesn't even post. Doing this on a 680i SLI board. Any suggestions? Share this post Link to post Share on other sites More sharing options...
vidiotking Posted February 28, 2011 Posted February 28, 2011 So, I've been running my E8400 at 4GHz for about 2 weeks. It's prime95 24hours stable, and I haven't had any issues with it thus far. Voltages are almost all stock, except the VCore which is 1.29v. I have it running 24/7 at this frequency (temps are nice and cool- 30C idle, 44C load), but I wanted to bump it and see what I could get it to do. Unfortunately, I noticed immediately that even as high as 1.35v, I can't get anything past 4.05GHz stable. At 1.35v I get an almost immediate fail of prime95. 1.32 I get a BSOD during boot. 1.30 doesn't even post. Doing this on a 680i SLI board. Any suggestions? Share this post Link to post Share on other sites More sharing options...
vidiotking Posted February 28, 2011 Posted February 28, 2011 I don't have an answer to your question. But, I do have a question for you. I can't figure out how to oc my e8400. Maybe you could help me w/ that? I'm not a complete idiot.... I've tried it a couple times w/0 any luck. Share this post Link to post Share on other sites More sharing options...
iskout Posted February 28, 2011 Posted February 28, 2011 What have you tried so far? What's your system specs (Motherboard, RAM, etc.) Share this post Link to post Share on other sites More sharing options...
vidiotking Posted February 28, 2011 Posted February 28, 2011 What have you tried so far? What's your system specs (Motherboard, RAM, etc.) I'm not at home atm, so I can't come up w/ all that right now. I'll be happy to post it to you when I get home at 550pm cst... I'd appreciate the help. Share this post Link to post Share on other sites More sharing options...
ARandomOWL Posted February 28, 2011 Posted February 28, 2011 Firstly, I don't have any experience with your chipset. You could try raising the NB voltage a bit. Don't ask me how much, I have no idea, just don't go crazy If that doesn't help it may just need more vcore. I probably wouldn't go past 1.4v for 24/7 personally. How much you try is upto you. Sidenote: Have you checked your RAM is running at a reasonable speed? ie. it's still at stock or below (unless you know what clocks it will do and you are within it's limit). Share this post Link to post Share on other sites More sharing options...
iskout Posted February 28, 2011 Posted February 28, 2011 Firstly, I don't have any experience with your chipset. You could try raising the NB voltage a bit. Don't ask me how much, I have no idea, just don't go crazy If that doesn't help it may just need more vcore. I probably wouldn't go past 1.4v for 24/7 personally. How much you try is upto you. Sidenote: Have you checked your RAM is running at a reasonable speed? ie. it's still at stock or below (unless you know what clocks it will do and you are within it's limit). I'm still within spec for my RAM (Or close enough, anyway... 801MHz ) I might try bumping my VCore to 1.4v, but if that makes it stable I'm not going to leave it there. I'm iffy about putting my CPU past 1.35 for 24/7, since when I upgrade to SB, this will be going into my mother's computer. Share this post Link to post Share on other sites More sharing options...
ARandomOWL Posted February 28, 2011 Posted February 28, 2011 Did you try any extra NB voltage? Not sure when this chipset starts to need more voltage to stablise the FSB. Share this post Link to post Share on other sites More sharing options...
Nephilumos Posted February 28, 2011 Posted February 28, 2011 I know I couldn't get anywhere past 4.0GHz stable with 800MHz RAM(I got it as far as 844MHz before it would fail MemTest) with my old E8400. I think it's probably the RAM. I would see if some 1066MHz RAM helps you up the OC. Share this post Link to post Share on other sites More sharing options...
ARandomOWL Posted February 28, 2011 Posted February 28, 2011 Good point. Isn't the E8400 on a 9x multi? That means your FSB must be around 445MHz. I know on Intel chipsets, the lowest FSB:RAM ratio is 1:1 (again, don't know about the OP's chipset), meaning the RAM must be running at almost 900MHz. Share this post Link to post Share on other sites More sharing options...
Nephilumos Posted February 28, 2011 Posted February 28, 2011 (edited) Good point. Isn't the E8400 on a 9x multi? That means your FSB must be around 445MHz. I know on Intel chipsets, the lowest FSB:RAM ratio is 1:1 (again, don't know about the OP's chipset), meaning the RAM must be running at almost 900MHz. I'm fairly certain the E8400's Multi is unlocked, though I'm not 100%. EDIT: Although, with my 750i board I was running my E8400 on it was picky about FSB:RAM Ratio which kinda decided what mutliplier I was using. Edited February 28, 2011 by nitem4re Share this post Link to post Share on other sites More sharing options...
ARandomOWL Posted February 28, 2011 Posted February 28, 2011 (edited) Only unlocked 775 chips are the QX quads and the E6500K. Here is clarification of the 9x multi: http://ark.intel.com...t.aspx?id=33910 Edited February 28, 2011 by ARandomOWl Share this post Link to post Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now