Proper radeon cooling

[Shuzer]

I run my Radeon 9700 OCed to just about 9700 pro speeds, but, with my case closed, after about 2 hours, it gets a little hot and I notice artifacting (but only after a couple hours of use), what's my best choice for cooling?

I have PCI slot fan below the card to help it keep cool, and the card has a fan on it.. as of now, I just open my case up when I want to play games, which is fine, but in the future I don't want to do this (and I enjoy the OC too much to put it at stock )

What's suggested here for the cooling? I have 3 case fans blowing in, and 2 PCI slot fans blowing air out.. and I'm not looking to buy that Zalman VGA cooler.. lol

 

[richpull]

Freezer, wait till the winter, play in spurts, Lower the core voltage, Get bigger fans, run the fans at higher rpm.

 

[Shuzer]

well, that was certainly helpful =/ I was more leaning towards is there any sort of heatsinks I could buy and stick on there, or something.. just thought I'd ask