Like i said it is probably pretty close to a HD6450 with 4 extra TMSU's. A HD6450 @ 625 mhz does about 200 GFLOPS. It's mostly the fact that the Wii U's gpu is clocked slightly lower that causes the number to plunch below 200 GFLOPS. But GFLOPS don't tell the whole story, for example the RSX of the PS3 is capable of 400 GFLOPS but is generaly regarded as slightly less powerfull than the 360's Xenos witch does 240 GFLOPS.