Thinkpads Forum

RMClock worked quite well in reducing the heat on my L625 Dual Core X100e. My stable settings went from:

Stock:
4.0x (800MHz) = 0.8000V
8.0x (1.6GHz) = 0.9500V

Undervolted:
4.0x (800MHz) = 0.6500V
8.0x (1.6GHz) = 0.8250V

That reduced my CoreTemp results from max of 79C down to 68C (at 100% CPU load at 1.6GHz). I'm quite happy with that, as it should improve battery life as well, and the fan is rarely going above it's lowest speed.

HOWEVER!
Since RMclock is not 100% compatible with this CPU, it lists lots of "Index" values (for all the different multipliers or FID values) between 4x and 8x. My question is: Should I use these extra muliplier settings, or not?

In other words... By default, does this processor "ramp" the multiplier (and voltage) up and down between 4x and 8x (max and min) when adapting to demands, or does it just use ONLY 4x and 8x? My fear is that using the adaptive "Power on demand" settings I've created in RMclock, I may be stressing the processor by jumping from min to max voltage so much. But if I do use them, maybe I am asking the CPU to do something it is not designed to do (like run at 1.2GHz).

Any experiences?

I'm using 3 multipliers 4x,6x,and 8x, w/o any drawbacks.

But is the 6x ever actually used? Or are you forcing a fixed 6x setting on one of the profiles as a middle setting? I can't see any benefit in adding the extra multipliers. It seems the CPU is just always at min or max.

think2wice wrote:But is the 6x ever actually used?

Yes, sometime is used tough less frequently than 4x and 8x

RMClock's Advanced CPU option page should give you a selection between Official AMD P-state transitions and Direct P-state transitions. My X100e (the single core AMD one) has official 4x, 4.5x, and 8x.

how much longer is the battery life on a 6 or 3 cell are you getting?

OP, is it possible that you can post the screen captures of the RMClock settings? I'm a little puzzled at all the settings there. A little tutorial would be awesome.

http://img146.imageshack.us/img146/4766/10791424.png

This isn't exactly my X100e, but it's my T400. You'll have to take the stock settings and start stepping them down until you start crashing or failing Prime95/IntelBurnTest. There are plenty of undervolting guides on the internet.