Not to nitpick, but I'm sure you mean 7 mh/s, not 7 gh/s, don't you? 
There are people who would pay a LOT of bitcoins to know how to get 7 gh/s out of a CPU, let alone GPU.
Yh thats was a mistakeThere are people who would pay a LOT of bitcoins to know how to get 7 gh/s out of a CPU, let alone GPU.