ThaBlackBaron on 05 February 2013
Its Hella FUNNY that digital foundary jus assumed the Wii U GPU is based off the 4650 cause its a "very close match" : "The Wii U GPU core features 320 stream processors married up with 16 texture mapping units and featuring 8 ROPs.".
Eeven though the 5550 is a better and almost EXACT match to the Wii U GPU features : http://www.amd.com/US/PRODUCTS/DESKTOP/GRAPHICS/ATI-RADEON-HD-5000/HD-5550/Pages/hd-5550-overview.aspx#2
So they justed guessed the inferior GPU, even though the features of the 5550 fit better AND that its has been rumored from the beginning that the Wii U features a CUSTOM Evergreen Radeon GPU , Which would be a 5000 series like the 5550
