1. No. 2. Not really. You still have the possibility of varying the speed on an asynchronous CPU. When you want stuff to go faster you can raise the voltage an

1. No. 2. Not really. You still have the possibility of varying the speed on an asynchronous CPU. When you want stuff to go faster you can raise the voltage and increase the cooling. I remember reading at the time of the ARM AMULET that they tested one by cooling it with liquid nitrogen and ran it at a high voltage, and got it to go as faster in benchmarks than the contemporary standard ARM processor.