AMD = performance
AMD's R600 leads Nvidia by about 20% even with less and slower memory. The R600 is 29.6% faster doing Call of Duty 2, 21% faster on Oblivion, 16.3% on 3DMark06, 29% faster on Cadalyst C2006, 29% faster on Autodesk 3ds Max v8 OpenGL, 41.1% faster on Autodesk 3ds Max v8 D3D, 26.4% faster on Catia 02, 58% faster on Maya 02. It was a total slaughter.
Those tests with small differences are clearly sign of CPU bottleneck. Wait till you see it on K10.
Just to remind you, the 2.5GHZ K10 is 33% to 66% faster than Intel's 3GHZ quad core.