Below are some statistics about the mining performance of various hardware used in a Bitcoin mining rig.

Notes:

    Mhash/s = millions hashes per second (double sha256 raw speed performance; may not be very energy efficient with some models)
    Mhash/J = millions hashes per joule (energy efficiency; 1 joule of energy is 1 watt during 1 second: 1 J = 1 W*s)
    W = watt (maximum power consumption, i.e. energy per unit of time: 1 W = 1 J/s)


https://en.bitcoin.it/wiki/Mining_hardware_comparison