Nvidia 8800 GT Temperatures

i there!

I have bought a PC 6 months ago. My PC Specs:
Intel Quadcore Q6600 2,4 GHz
4 GB RAM
Nvidia 8800 gt 512 MB
Windows Vista Home Premium 32 bit

When I look to my temperatures with Everest Ultimate Edition, I notice that my idle temperature, of my videocard, is 63-64. I'm just watching some youtube video's, chatting, typing a word document.

When I start up and play Call of Duty World At War, my temperature will almost reach the 80, or are 80, but never go across the 80's. I'm playing CoD on very low. (Everything on low)

Is that normal? I'm confused and scared that the videocard will die..

I have a normal (stock?) cooler. I dont want to buy a new cooler cause my mom things there is something wrong with my PC.
Thanks.

^ +1, but its very risky taking off the heatsink to apply new thermal paste, sometimes copmanies will void your warranty if you do. 8800GT runs HOT

It is fine for the temps, my passive 8400GS reaches 60C on idle and like 80-90C on load lol, your completely fine. If you want there are aftermarket coolers.