Tom's Hardware > Forum > CPU & Components > CPUs > Phenom ii x4 955 BE, undervolting, overclocking advice

Phenom ii x4 955 BE, undervolting, overclocking advice

Forum CPU & Components : CPUs - Phenom ii x4 955 BE, undervolting, overclocking advice

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yannifb   09-28-2009 at 02:06:29 AM

I have been wondering if its better (perf. wise) to OC with the multiplier or the bus speed. I undervolted my 955 to 1.175 volts, and it is perfectly stable (and very cool). If i lower the multiplier, but raise the FSB can i get better performance and keep the undervolt and low temps?

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yannifb   09-28-2009 at 04:07:48 AM

bump... someone must know something about this

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rand_79   09-28-2009 at 05:15:10 AM

try it .. let us know how it works

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yannifb   09-28-2009 at 05:41:04 AM

Ok did a few tests and here are the results, from Overdrive:
Stock speed 3.2 Ghz and stock settings (200 x 16.0) = Avg 7200, sometimes 7600 in Overdrive bench.
207x15.5 (3218 Mhz) = avg 7100 - decrease here, weird
214 x 15 ( 3210Mhz)= avg 7200, but never 7600 like stock settings.
220 x 14.5 ( 3190 Mhz)= avg 7300, minimal improvement

Mind you all these tests were done with a core voltage of 1.175, and were stable, with the same temps all around. I could push it more but im not sure if its safe to raise the HT clock past 220.

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yannifb   09-28-2009 at 05:47:05 AM

Ok i also tried 3.4 Ghz at 1.175 volts, but it ended up being unstable.

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