I had a laptop having an AMD Turion 64x2 @ 1.9Ghz proc with 1.5GB of RAM, 160GB SATA HDD.
That good 'ol beast could easily run my GTA San Andreas on high settings! :D
Plus thats not it, it was fully capable to run CoD MW2 on medium settings too (offcourse with AA turned down).
In short, as per my experience AMD has always been manufacturing..giving its users the best of the best hardware in respect to the price (if we compare it to Intel's offerings).
Starting from AMD's first Athlon 64 bit proc (sill remember that shiny tall alloy case in an exhibition :) was looking cool actually) all the processors released after tht were nearly 90% defect free.