though the main idea is:

27,3% defekt (55/Wafer)
0,4% Single Core (fast 1/Wafer)
4,6% Dual Core (9/Wafer)
23,2% Triple Core (47/Wafer)
44,5% Quad Core (90/Wafer)
47 Phenom X3 chips per 1 wafer! it's enough for mass production/