FEEDTHEADDICTION Posted March 21, 2009 Posted March 21, 2009 NOTE: all voltages are taken from BIOS not CPUID I have been trying to minimize vcore and subsequently temperatures for my Q9550 @ 3.68Ghz. Although I have successfully achieved this @ 1.30 vcore (1.26vtt 1.50pll) with pretty decent air cooled results: 41-39-45-40 (Tcase @ 32) but I noticed something along the way that could probably help me shave a few more v steps off.... Tell me what you think? when priming at 1.28500, I got stable results on 3/4 cores but got a rounding error real fast with the 4th core(logical cpu #3). Is this a clear sign of too low a vcore or do you think its possible to correct this "unstable behavior" with a GTL ref adjustment??? CPU: Q9550 @ 3.68Ghz MB: Striker II Extreme RAM: 4GB ddr3 1333 9-9-9-24 (stock) OS: Vista 64 GPU:evga 9800Gx2 @ 702/1750/1100 HDD: 640GB 7200rmp FDD:Blu Ray PSU:TX750W CASE: Cosmos S Share this post Link to post Share on other sites More sharing options...
ccokeman Posted March 21, 2009 Posted March 21, 2009 It happens. I have one weak core on a 9450. you could try gtl ref voltage adjustments and skew settings to crutch it along. I would look a little closer but both my 790 boards are on the way back for RMAs. Share this post Link to post Share on other sites More sharing options...
Verran Posted March 21, 2009 Posted March 21, 2009 Just for reference: The fact that it's only one core really has no relevance. That's pretty much always the case. One of them will always crack first and then it shuts down before the others get a chance. I've never heard of anyone getting multiple core failures at the same time in P95. That's just the way it's set up. Share this post Link to post Share on other sites More sharing options...
ccokeman Posted March 21, 2009 Posted March 21, 2009 Especially when the newest versions you can isolate a work thread to a core to find out what one really does fail. There will be that weak link that but the suggestions I made before are time consuming but fruitful if you take the time Share this post Link to post Share on other sites More sharing options...
Turophiliac Posted March 26, 2009 Posted March 26, 2009 (edited) I know this post is a few days old... but surprisingly enough, I was having this problem earlier today, trying to OC my Q9550 to 3.8GHz. I actally raised my NB voltage to 1.50v and I took my PLL voltage off of auto and put it on the lowest setting my mobo had (1.50v) and bumped it up one notch to 1.52v. I hope that gives th OP some idea of what he can do. Edited March 26, 2009 by Turophiliac Share this post Link to post Share on other sites More sharing options...
Kingfisher Posted March 26, 2009 Posted March 26, 2009 What is your VTT voltage.? Also, most stable pll voltages should be between 1.5 to 1.6. Share this post Link to post Share on other sites More sharing options...
Turophiliac Posted March 26, 2009 Posted March 26, 2009 I don't know what mine is, it's on auto right now. But I got clocked up to 3.93GHz stable but it won't post at 4 no matter what I do to it. What are the limits and safe vtt voltages people should be using? Share this post Link to post Share on other sites More sharing options...
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