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EIST - is there a way to go below 12x multi on the low end?

post #1 of 3
Thread Starter 
For the 970 I think 12x is the lowest unlocked value in the BIOS, and 25x is the highest (for stock 3.2 GHz chip @ 133 BCLK, 24x standard + 1x for TurboBoost)

Windows claims to however go down to 5% of the cpu speed in balanced power mode. Is the only way to go below 12x to get a completely unlocked intel chip? Or do even those go to 12x and stop?
    
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post #2 of 3
AS far as what I've seen the 5% that is in Windows' Balanced Mode is just for show and it means "lowest possible CPU speed". It may try to set 5% of the CPU speed but it can't get below whatever is the minimum set in EIST. Using EIST you can't get below 12x multiplier as Intel wants to limit the lowest speed high enough not to see a performance drop. Maybe a K processor can drop below 12x, but chances are you have to do it in the BIOS.

/offtopic For one I use K10Stats to tune my Phenom II & a Turion RM CPU to drop below minimum C'n'Q multiplier and to generally control ramp up/down speed from Windows. Maybe a similar tool exists for Intel CPUs (RMClock maybe?)
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post #3 of 3
Thread Starter 
Good to know, I will investigate RMClock.

My main thinking behind this entire thing is that while overclocking to something like 4.0GHz with a BCLK of 200, you can set a maximum multiplier of say 20x to get to 4.0GHz... but then when you are down at 12x, the cpu is still at 2.4GHz... when originally it would have been at 1.6 GHz at 133.3 BCLK. Theoretically the multi could go down to 8x at 200 BCLK and still be at 1.6 GHz, and possibly save some more power.

I would like to keep my BCLK up at 200 due to the fact that my memory runs closest to its 1600 sweet spot there without changing the ratio... but I still have a lot of tweaking to do with this new chip so I may end up maxing the multi and just scaling down the BCLK. Perhaps 25x and BCLK of 160 may be in order, if I can somehow dial in a 10:1 ratio... ergh
Edited by DJZeratul - 5/19/11 at 1:58am
    
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