Is it true that iPhone 4S's CPU actually runs on 800Mhz, not on 1Ghz??? I've just read an article saying that. Check out the link below. http://www.anandtech.com/show/4951/ Using some of the integer and fp tests of published Geekbench scores we can already conclude that Apple is shipping a lower clocked A5 in the iPhone 4S than it does in the iPad 2. This naturally makes sense as the iPhone 4S has a much smaller 5.25 Whr battery. Based on the Geekbench results it looks like the iPad 2 is clocked around 25% higher than the iPhone 4S, pegging the latter's clock speed at 800MHz Check out an attachment regarding benchmarking comparison, indicating that iPhone 4S is clocked around 800mhz.