[Capt. Insane]

As I'm sure you won't remember, my graphics card is an Evga 7600 GT 256mb overclocked to 600mhz core clock and 1560mhz memory clock. I'm starting to think that this overclocking is causing my problem with games lagging because the card's fan/heatsink aren't good enough to keep it well cooled. I did some searching on Google a while ago and found a few tools to underclock my card, but don't know how trustworthy they are or how safe it is to attempt this. One I found was actually a registry hack (sort of) that opened hidden options in the Nvidia controls to underclock the card that way. Would this be the best thing to do? Also, has anyone tried this themselves to see if it's safe? I'd really rather not have to spend another $200 to replace my card if this gets farked up. Or could perhaps adding another fan help better? I got the one in the front of my case working, but it's just causing the computer to inhale more dust than a chain somker inhales his cancer sticks. If anything, I would probably add an exhaust fan in the window, mainly to help with the dust problem, but I'm not sure that an exhaust fan would work as well. Suggestions? Thanks. The faster the better so I can do this before I go back to school on Sunday (I'm home on fall break).