Unfortunately, it's that time of year where it's unbearably hot, and my house is lacking air conditioning. This takes quite the toll upon my hardware, forcing my 8800GT up to 80 degrees under load, and 60 at idle.
I do not like that.
Yes, they're designed to run that hot, but it's usually around 40 idle and 50 load, and that much of a dramatic increase makes me nervous. So, after a bit of debate and lack of money, I took apart an old Pentium 2 Cartridge Processor, removing the fan from the heatsink.
I then used 4 zip ties to hold it snugly against the top of the card, allowing for air to be blown across the backside of the GPU, and flowing out from the 1/4 inch of clearance the fan allows.
And voila, a 5 degree drop in temperatures, although I'm debating whether or not it's worth it.
Technically, it should run no risk to the card, seeing as plastic (all I used) is non-conductive, and the zip ties are not tight enough to damage or warp the card.