20 / 24 Pin Question

In the case of Intel, the 24 pin (2x12V and 2x0V extra) is used for Extreme edition CPU's or higher amperage CPU's (06 code I think). Everything under that can survive with 20pin. I presume that if you going for a "light" CPU on the AMD side, you can get away - although I'm no boffin on AMD CPU's.