Video card running really hot

[AzNVi3t2007]

Try using a different heatsink. Put an extra fan in the unit itself.

[fpsmitch]

add another fan to it with what? zipties?
and you dont have a case fan?
generally a case fan will help if you dont have one...gaming pc's make alot of heat.

[AzNVi3t2007]

whatever works. as long as it gets the job done lol...

[Calum]

Glad that blowing into it helped, seems you had quite a build-up of dust.
I have read that the fan on that model is pretty loud.
If it worries you it is possible to get an aftermarket cooler which will be quieter and will cool the card better, however these can be tricky to fit and/or take up a lot of space.

[ThanksForHelp]

I used to use an 8600 as well but I ended up giving it to a friend because I had ordered a new card.
After I gave it to my friend he had some temperature issues as well and after a quick google search he found some interesting fixes.  Oddly enough I looked into his computer and no longer saw the heatsink but a piece of cardboard with a fan from an old card attached to it.  As odd/dangerous/stupid as it may seem it did happen to lower the GPU temp 5-10 degrees.  I can't really say how it effected his whole systems temperature because ntune has an interesting way of keeping information like that from you. 
I'm not saying this is the greatest fix but it does affect temperatures.