Fun Fact: When the PSP launched, the CPU was capped at a clock speed of 222 MHz. The CPU was capable of a higher clock speed of 333 MHz, but it was kept low to help save on battery life. A later firmware update allowed the handheld to run at 333 MHz so developers could do more with the hardware. God of War: Ghost of Sparta is one of several games that utilize the full clock speed of the PSP. It's a prime example of a game that pushed the hardware to its limit.