GTX 570 - 10.1 Mh/s

280x REV2 - 9.6 Mh/s

hmmm..this is mine

:
R280X: 55.0C 2043RPM | 11.42M/11.51Mh/s
R290: 64.0C 55% | 15.27M/15.28Mh/s
same, but a single 750ti can do 13M and they cost 1/2 of 280x and much less energy required
That's good to know. I think I am gonna buy 750ti.

what brand you have? Do you know how much you can get with the higher models 770, 780?