Well-known hacker Marcan, part of Team Twiizers who originally hacked the Wii, has found out the clock speed of the Wii U. It’s a well known fact that the PS3′s Cell and Xbox 360′s Xenon run at 3.0 GHZ each per core, but the Wii U CPU runs at 1.243125 GHz
One interesting thing he has revealed is that the Wii U is easier to hack, akin to the Wii. He tweeted that they’re calling the Wii U security processor the Starbuck (vs. Starlet on Wii). And it seems to be about equally vulnerable, too.
"It’s a Three PowerPC 750 type cores (similar to Wii’s Broadway, but more cache)", he tweeted.
He has also revealed the GPU speed of the Wii U, which runs at 549.999755MHz.