ethomaz said:
The HD 4770 runs at 750Mhz... I said a RV740 downclocked to 500Mhz... at max 600GFLOPs... in line with the rumors.
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I've moved towards believing that Nintendo is far more likely to choose a GPU that already has the rough cost, performance and energy consumption they want and to moderately modify it (essentially choose a notebook GPU) than to take a desktop GPU and try to engineer it down to the cost, performance and energy consumption they want.
While there are multiple options in the Radeon 6xxxM and 7xxxM lines that are based on the Turks core, are manufactured using a 40nm process, have 480 stream processors, and run between 25 and 40 Watts (all things that match most of the rumours) the fact that they all have between (roughly) 600GFLOPS and 700GFLOPS of processing power gives us a pretty good idea of what Nintendo could do by picking one of these GPUs as their base. Even the desktop GPUs that match this profile (Radeon 6570, 6670, 7570 and 7670) all still run in the 600 GFLOPS to 800 GFLOPS range, although their wattage is higher (in the 60 Watt range).
Ultimately, we can argue endlessly about what the Wii U GPU might be based on, but I think it is fairly clear that it is probably (about) 3 times the performance of the XBox 360 GPU; and there is probably some increased efficiency and better features that come from being a more modern GPU.
