G5rocks Posted November 1, 2007 Share Posted November 1, 2007 I'm trying to overclock my Q6600 B3. It's running fine at 2.8GHz, vcore on auto - no errors in Prime95 (10 hours test) At 3GHz i'm getting errors in Prime95 - i also saw 2 Kernel Panics in Leopard while at 3GHz Already tried to raise Vcore voltage - my last try was: Bus 333, RAM 667, Multiplier 9, Vcore 1.4v (1.4 is the BIOS setting - all tools report lower voltage.) Going higher than 1.4v (BIOS setting) is not a good idea isn't it? Or is it really undervolting that much? (Idle 1.36V - stressed 1.32V) Temperatures were good at 3GHz and lower voltages but with this last setting it goes up to 68°C during Prime95 test. I'm a n00b - maybe someone with the same setup can help me? (i know... all Q6600 are different) Link to comment https://www.insanelymac.com/forum/topic/69073-asus-p5w-dh-deluxe-q6600-b3-overclocking/ Share on other sites More sharing options...
G5rocks Posted November 2, 2007 Author Share Posted November 2, 2007 Just tried 2.9GHz vcore set to 1.35v in bios - prime95 error after 10 minutes Link to comment https://www.insanelymac.com/forum/topic/69073-asus-p5w-dh-deluxe-q6600-b3-overclocking/#findComment-490942 Share on other sites More sharing options...
shoarthing Posted November 2, 2007 Share Posted November 2, 2007 . . I usually sort out the max 'happy' FSB first: drop the multiplier to (say) 7 & see if you can run the thing at 400MHzx7 - you will almost certainly need to increase NBridge voltage, & give it a touch more SBridge volts; but it shouldn't need more vcore to the CPU. This gives you decent memory bandwidth [i am assuming you can run your posh Mushkin stuff at 1:1 & 400MHz - check the recommended VDIMM for various speeds]. If this is stable, increase the multi to 8x & see how far you can get . . 3.2Ghz is a fair old 'clock with your quad's stepping; but it may be possible. Link to comment https://www.insanelymac.com/forum/topic/69073-asus-p5w-dh-deluxe-q6600-b3-overclocking/#findComment-490949 Share on other sites More sharing options...
G5rocks Posted November 2, 2007 Author Share Posted November 2, 2007 Specs of my RAM is 800MHz 4-5-5-12 2.0-2.1V Whats the recommended voltage for the north bridge? Where do i start when i leave "auto"? I just made some more tests: 3,15GHz (forgot to set the multiplier ) Vcore auto - Bus 350 - RAM 700MHz SPD on - Prime 95 failed 2.8GHz Vcore auto - Bus 350 - RAM 700MHz SPD on - Prime 95 failed 2.8GHz Vcore auto - Bus 311 - RAM 622MHz 4-4-4-12-4 - Prime 95 failed 2.8GHz Vcore auto - Bus 311 - RAM 622MHz 5-5-5-18-6 - Prime 95 passed (almost same setting that i had successful tested 10 hours in prime except ram timings which were SPD on) 2.8GHz Vcore auto - Bus 350 - RAM 700MHz 5-5-5-18-6 - Prime 95 failed 3.0GHz Vcore 1.4V - Bus 333 - RAM 667MHz 5-5-5-18-6 - Prime 95 failed Maybe my board does not like more than 311MHz? Link to comment https://www.insanelymac.com/forum/topic/69073-asus-p5w-dh-deluxe-q6600-b3-overclocking/#findComment-491003 Share on other sites More sharing options...
thefinalprophecy Posted November 2, 2007 Share Posted November 2, 2007 Does your CPU register right in "About This Mac"? I have the same CPU as you, and whether it was Kalyway 10.4.10 or Leopard 10.5, it shows up as Unknown CPU 2.6ghz, 1 cpu, 4 cores. Link to comment https://www.insanelymac.com/forum/topic/69073-asus-p5w-dh-deluxe-q6600-b3-overclocking/#findComment-491151 Share on other sites More sharing options...
G5rocks Posted November 2, 2007 Author Share Posted November 2, 2007 no - but in jas 10.4.9 with 10.4.4 loginwindow it worked Link to comment https://www.insanelymac.com/forum/topic/69073-asus-p5w-dh-deluxe-q6600-b3-overclocking/#findComment-491162 Share on other sites More sharing options...
shoarthing Posted November 2, 2007 Share Posted November 2, 2007 . . . Whats the recommended voltage for the north bridge? Where do i start when i leave "auto"? . . you might start with a re-read of this post: the Northbridge [mch] needs up to 1.65 [depending on how well it is cooled] for 400MHz+ Link to comment https://www.insanelymac.com/forum/topic/69073-asus-p5w-dh-deluxe-q6600-b3-overclocking/#findComment-491373 Share on other sites More sharing options...
Loyx Posted November 3, 2007 Share Posted November 3, 2007 I needed vCore=1,5v to get my E6600@3.2 stable. Just check temps with TAT or SpeedFan when stressing cpu (I used orthos).. Never over 60C. 45 on idle... The Ram is working 2.1v 4-4-4-12 Link to comment https://www.insanelymac.com/forum/topic/69073-asus-p5w-dh-deluxe-q6600-b3-overclocking/#findComment-492678 Share on other sites More sharing options...
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