I always appreciate caution, but unless Nokia got a special 3430 chipset that is "weaker" than the ones in the Archos 5 and Sammy / Motorola phones, 800mhz is well within the operational ceiling of the chipset. The one caveat is if the cooling solution in the N900 is weaker than those units, but I notice zero temperature difference between 800mhz and 600mhz. I also have not noticed the battery to be draining any quicker, based on my normal use. I DO notice that the N900 performs very smoothly now, for everything to do with the phone. I could not say that before. The N900 is now just as smooth as the Droid (which is also at 800mhz max scale). Kind of like (in a loose way) the SU7300 Intel chip. Stock is 1.3ghz, but ASUS and Dell both ship at 1.73ghz. I luv my M11X- almost as much as the N900