I have spent most of the day modding an EVGA 280 GTX HydroCopper. I will be posting results with pics, ect later this weekend. Its a hot chip, no doubt.

It does not respond to voltage over 1.350 and Riva/EVGA Precision cannot clock it over 800 mhz. Only way to get higher is by using Nibitor and flashing a BIOS.