actually the power per dollar ratio is very close between intel and amd and amd still has the slight edge but only in price .
As a rough bangs-for-buck measure we matched each CPU's published price against its SYSMark and PCMark scores. The $999 Core 2 Extreme delivers more points per dollar (or pound) than the $827 FX-62, but only just: 7.91 PCMark points to 7.51, 0.387 SYSMark points to 0.330 for every dollar spent on the chip. Had AMD not cut the FX-62's price recently, it would have scored just 6.22 and 0.280.