Temps are a little high- maybe. I have seen people post a lot higher.
Kombustor has everything maxed out to make the video card crash if it is going to.
Remember it is the test ware for the MSI Afterburner OC software.
You OC a bit then see if it crashes.
A game does not keep the video card maxed continuously.
Keep an eye on the temps when gaming just to be safe. They will probably be lower and vary through the game.
If they are lower in game enjoy and don't worry!