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speedstep and other bios options and overclocking myth or fact? - Page 2

post #11 of 14
Thread Starter 
Quote:
Originally Posted by CL3P20 View Post
Can you verify that it actually changes the strap, in 'idle mode'...I am running 400FSB, 9x multi w/ speedstep enabled...no issues here bud.
I can't verify if speedstep will cause problems or not at that speed but I do know going from 400 to 401 mhz causes a HUGE drop in memory performance. from what it also seems by many programs the northbridge (not real FSB) frequency is also dependent on cpu multiplier. if you have everest check it out sometime. run at x9 vs x6 at the same fsb and you will see the frequency jump for the fsb though it could be program error also. thinking though with the northbridge running on the edge( at least on my mobo) if it does get that little extra kick then it might have some problems. that is an assumption on my part though
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post #12 of 14
Quote:
I do know going from 400 to 401 mhz causes a HUGE drop in memory performance. and from what it seems the multiplier seems to change the true frequency the northbridge runs at according to a few programs out there.
Yes I can show you that much. SiSandra shows my FSB at 400mhz, NB at 444mhz and RAM at 400mhz, 8996mbs. If I raise the multi back to 10x, the NB speed drops back down to 400mhz, and RAM mbs drop to ~7600mbs.

Also, CpuZ reads the latency of [9x, 400mhz] at : L1- 3 and L2- 16...while at [10x, 400mhz] it is L1-3 and L2- 13. So the latency improves, but the speed drops as you raise the multi. Lowering it has the opposite affect.

This does not answer, if 'speedstep' actually changes the strap on the NB when IT lowers the multi for power savings.
post #13 of 14
Thread Starter 
that's what I was trying to get at I don't believe it would change the strap but that for some might be a problem since for many 400 seems to be borderline stable or not. so if the muti drops, northbridge clock picks up but yet strap stays the same it might lead to meltdown. but I have no proof either way and I don't know if my speedstep even works to try to test it out though any way either.
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post #14 of 14
Could just be your voltage settings.

ICH- 1.2v
NB- 1.4v
SB- 1.6v
PCI-E freq- 105mhz
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