How to calculate MH/J ?

[MasterHunterHD]

Hello everyone,

How do you calculate your graphics card energy efficiency ? (MH/J)

Thank you

[kagidab]

Hash rate = hashes / time : R = h / t
Power = energy / time : P = E / t
-> Hash rate / Power = hashes / energy : R / P = h / E

You have to multiply by your PSU's efficiency to get the actual amount that a graphics card will draw from the wall. The more difficult part is figuring out how much a single graphics card uses.