im trying to figure out the vddc as well, i set it to 1068 for a card because its not as high quality as the others. im using afterburner to tune the cards which all are -60mv(1037-1068mv) but this one is -48mv(1093-1131mv) so i put in the low numbers and set everything to the min values shown here then it just puts it all back to original and runs that from what i see in afterburner after flashing and restarting... im running 580 pulse 8gb hynix cards