To be honest, the video card "should" be built to run at full capacity and be able to keep its core cool if its a high end card (in the right enviroment ex: a well cooled case). But that being said, it deffenatly cannot hurt to have extra cooling in your machine. The cheapeast way to do this without phase change cooling or water cooling, would be to get cross flow air through your whole pc. The best way to do this is have intake fans on the front lower end of the case as cooler air is always at the bottom and then have some rear exhaust fans that are mounted in the rear upper section of the case, or even better have a couple of exhaust fans at the top of your case as you know hot air rises.

If you have a few bucks to spend, DIY water cooling for CPU and Video card can work extremely well, and is also fun to build. And im sure alot of you guys omn this forum and pushing machines to there limits

Hope this helps.

Chad