I have no idea about the radeon range of graphics cards. I have the 7200 vivo card which I picked up for $30. It has a little fan on it which makes a crap load of noise.
I have an old AMD aluminum heatsink (you know the one you get with the retail chips). I am thinking of dremeling it down to about an inch high and cutting the sides off so it is around and inch square, and attaching it to the GPU with heat tape stuff.
Will this provide enough cooling? It will be in a desktop (remember those) case with no system fans.
Passive cooled radeon?
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BFG, I'm using a 9000 Pro and have had the fan disconnected for a month or more with no ill effects including long bouts of gaming. It did have some incidental airflow from the internal 120 fan on my Sonata but that fan has now been replaced by an undervolted 60x15 Panaflo directly under the HD. Point being, the graphics card is getting by just fine w/ only the random turbulance in the case.