Some documents from the Federal Communications Commission (FCC) are suggesting that the new PSP Go may be packing more power under its sliding exterior than what Sony has officially revealed.
Contrary to official statements from Sony that peg the PSP Go's top clock frequency at 333 MHz, the FCC's test reports indicate that the PSP Go actually maxes out at 480 MHz. Perhaps the extra power is for the in-game XMB. Games would likely still be locked at the 333MHz max for uniformity across all of the PSP SKUs.
You can check out the FCC reports here. The 480MHz max clock frequency is mentioned in page 3 of the Test Report 1 pdf. The official tech specs can be viewed here.
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