silvo conticello <silvoc at tiscali.it> writes: > Yes, I remember this was the case on my previous AlBook (10.3.9), but > now, in my new computer (10.4.3), I don't have the speed options > anymore... > Does anybody else have/does'nt have the speed option on their new > AlBook? Indeed, you are correct. I checked the developer note, and, sure enough, the computer is fixed at Automatic. It will jump between 1/4, 1/2, and full-speed (and vary the core voltage, as well), depending on how heavy the CPU load is. The GPU does a similar thing to save power when you're not taxing it very much. I'm not sure whether the main settings (eg "Best Performance") affect the CPU's power saving measures; if anybody has Marcel Bresink's Hardware Monitor, I bet you'd be able to see the CPU core voltage, which will also tell you what CPU speed you're running at: 0.93 V for 417 MHz, 1.28 V for 833 MHz, or something larger (I'd guess around 1.36 V) for full-speed (1670 MHz).