Wii U specs are surprising, says Sonic developer, specifically the GPU and memory

[HappySqurriel]

Kynes said:

HappySqurriel said:

...

Even if the Wii U's GPU was based on the RV740 (Radeon HD 4770) rather than the rumoured RV770 (Radeon HD4850/HD4870) the Wii U's GPU would have almost three times as many transistors as the XBox 360 GPU or the PS3 GPU  ( 826 million for RV740 vs. 337 million for the Xenos and 300.2 million for the RSX).

I think the rumors talk about the R700 family, not of a concrete chip. I think RV730 is a more reasonable alternative, or a very underclocked RV740. 4770, made on 40nm, had a TDP of 80W

But you're looking at it as "Nintendo had to take a stock GPU and run it at the same clock rate as when it was released for the PC" ...

We don't know what was really done, Nintendo could have taken the RV790 XT modified it, swiched it to the 40nm manufacturing process, and under clocked it to 650MHz resulting in a GPU that has 75% of the performance of its PC counterpart while consuming 20% as much energy.