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23 multiplier not ideal for i7-950 D0?

post #1 of 7
Thread Starter 
i see some running 19's and odd numbers does it runn better lower multiplier higher bclck setting? or 23 muliplier and just try to get the higher bclck out of the voltage you have?!
    
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post #2 of 7
generally when overclocking, you want the multiplier to be as high as possible. bclock overclocking is not as stable, so do not lower the multiplier.
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post #3 of 7
Thread Starter 
Thank you. Rep +1... I got unable to detect some of the hyperthreaded logical cpus on my 4.1ghz prime 95 BLEND test that im in the middle of right now. at 1.320vcore. Should i jsut disable HT (hyperthreading) and see what my clock speeds are at there? or will it run less/more stable. i jsut passed self-test 640k. sofar so good.
    
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post #4 of 7
disabling HT does give you more overclocking headroom and lower temps. it depends on what you are doing. in some cases (like games) disabling ht does not even hurt performance. with multi-threaded encoding or rendering it can be a different story though.
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post #5 of 7
Quote:
Originally Posted by L337Something
o so 4.1 4.2 is about all i'll get out of this beast?
if you can get some serious cooling (think peltier) you may be able to go a bit higher. just remember; 7.1GT/s is just about the absolute maximum QPI limit. also, if you want to push that thing much further, I would watercool the chipset as well as the CPU.
oh, also, your mailbox is full.
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post #6 of 7
Thread Starter 
qpi limit... thats the one thing i dont have any idea about and have left that alone at a solid 1.35 volts... lol oh and my link data rate qpi is 6316 MT/s should i raise that?
    
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post #7 of 7
I have better luck with the 23 multi on mine, but I seem to hit a bclk wall after 195. I have not had any luck with going to 200 or higher.

Ideally i would like to run 200 bclk and a 20 or 21 multi to get my ram at 1600 and cpu at 4.0 - 4.2. But I have not been able to so I run 185 x 22 for 24/7 (4.060) @ 1.352v. I think I am stable at 185 x 23 (4.24) @ 1.39v, but temps peaked at 79c in prime95 which is a little to high for my taste. Waiting on a better rad and will try again..


So really each cpu will be different. Some will like odd multis and higher bclk, but others wont. Just have to try different settings til you find whats best.

Max voltages per intel are 1.35v on the QPI/VTT and 1.55v on the core.
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