There's very little definitively known about the 1 GHz Apple A4 CPU, other than it's an ARM CPU. Rumor is that it's Apple's customized version of the Cortex A9, the first multicore ARM chip. If it's a dual-core 1 GHz chip, it could easily have 3x the processing power of the iPhone's 600 MHz (or so) CPU.
No wonder everyone raves about how fast the iPad is compared to the iPhone and iPod touch!
The Apple A4 is not a CPU per se. It's a so-called SOC - System On a Chip, like the ASIC of old.
ReplyDeleteIt is a 1 GHz ARM Cortex-A9 MPCore processor (not sure if dual core) and an ARM Mali 50-Series GPU. PA Semi's "contribution" was to bolt them together, onto the same piece of silicon, and add a memory controller.