Anandtech claims the GPU is built on the AMD RV7xx core.
http://www.anandtech.com/show/6465/nintendo-wii-u-teardown
The fastest GPus made on RV7xx is 4890.
Comparing to Xbox 360 which uses AMD Xenos (RV520):
http://en.wikipedia.org/wiki/Xenos_(graphics_chip)
This is a chip based on ATI X1800.
A 4890 is about 3x faster than a X1800, so I would not worry just yet.
http://www.anandtech.com/show/6465/nintendo-wii-u-teardown
The fastest GPus made on RV7xx is 4890.
Comparing to Xbox 360 which uses AMD Xenos (RV520):
http://en.wikipedia.org/wiki/Xenos_(graphics_chip)
This is a chip based on ATI X1800.
A 4890 is about 3x faster than a X1800, so I would not worry just yet.
Desktop HTPC:
Gigabyte Z97X-Gaming5- i7-4790k MSI-B75-E33, i5-2500k
Corsair Vengeance 16GB RAM Crucial 8GB RAM
Gigabyte GTX780 GHz Edt. ASUS GTX960 Strix
Win 10 Pro / OS X 10.10 Win 10 Pro
Gigabyte Z97X-Gaming5- i7-4790k MSI-B75-E33, i5-2500k
Corsair Vengeance 16GB RAM Crucial 8GB RAM
Gigabyte GTX780 GHz Edt. ASUS GTX960 Strix
Win 10 Pro / OS X 10.10 Win 10 Pro
