No OC'ing, on this system, the PCI-E 1.0 system I just upgraded from was OC'd ~8% for the CPU but I don't think that system really taxed the card.
If I drop to the desktop with the game running it only shows as high as 59°C when I use RIVATuner to boost the fan speed. EVGA's site actually says the operating range goes as high as 80°C.
I submitted a ticket to EVGA last night, they just replied and advised RMA based on my description and the image provided.