Yes i agree every card overclocks differently. My evga superclocked gtx260 oc to about 740 core 1480 shader and 1250 memory(volt increase 1150mV). Im currently running sli so its possible i have more oc headroom on one card but not the other. I would recommend getting an evga card because i believe you can only get there voltage software if you own there products. Helps push your card more + great warranty.