Again, i make them so good.
I mod them, i spend a lot of time to find the right combination of voltages, cooling used, and a lot of other factors....
I stay hundred of hours on very cold ambient, lots of nights when i freeze an get sick, test and test again, because there was many failures on many nights when i can't get a single good result with those cards that " i get so lucky".
Without all this there was 1100mhz on air with HD5850 instead of 1150, 770mhz with Ultra instead of 810... and so on, but hey... i am so lucky.