275 watts would be SYSTEM power consumption. 130 watts is the "TDP", or Thermal Design Power. This is how much power the motherboard components Mainly), HSF, case etc. must be able to dissipate when using that processor. It doesn't neccesarily mean that the CPU actually consumes that much power. Ex. Athlon 64 3700+ Venice core is rated at 89 W, same as AMD Athlon 64 4000+ Clawhammer, but the Venice consumes less power