9800GT's and 8800GT's are one and the same, mine still work and ran fine in the same case for several years.
Yes I'm aware they are both G92. That's great yours still run after several years.....not really sure what that has to do with this post though.
My 9800GT idled at 90c and I got rid of it for that fact. I got a HD5850 overclocked that never goes over 55c even while gaming. My point was, 2 of those gotta really fry an egg on the case.