Your load temp seems a bit high to me. My Oc'd 6800gs (513 core, 1131 memory), runs at 44C idle and around 70C load. However, I did install an arctic cooler silencer VGA cooler and replaced the supplied thermal pads with arctic silver 5.
You should be OK, though, as I forgot to connect my GPU fan after some modifications and the card got up to 125C. That happened 8 months ago, and the card has been running fine without a problem since then. What are your CPU and ambient temps running? Also, what program are you using to view the temperature data. My friend was using Speedfan to monitor his temps, and the program was reading his GPU way higher than the Nvidia temp monitor.