X61s, cpu not downclocking, CPU-Z wrong?

Hey all,

I have a Lenovo X61s, 7668-CTO model, running Vista x64 Sp2 RTM. Installed the power driver and the ThinkVantage Power Manager 2.42 (2.43 doesn't start properly for me).

CPU is L7500, RAM is 3GB.

The lowest I've seen the CPU clock go down is 1200mhz, and that's on Power Source Optimized profile. It never goes to 1600mhz no matter how hard it is pushed. I tried a 32M wprime and it stayed at 1200mhz.

If I select Maximum Battery, it stays at ~1600mhz and never lowers.

I'm checking the CPU speed using CPU-Z 1.51

Now, the weird thing is, I am getting 70s at 1200mhz (Power Optimized), and 105s at 1600mhz (Maximum Battery), and 68s at 1200mhz (Maximum Performance).

Is there something amuck?

 

Don't use CPU-Z to check clock speeds. It doesn't accurately report clock speeds for notebooks that have SLFM (Super Low Frequency Mode). Try HWiNFO32, which seems to correctly report the proper speeds.

Also, I don't know for Vista, but for XP, you need to select the proper power scheme for speed stepping to work. Need to select Portable/Laptop or Minimal Power Management.