Help with buying an aftermarket GPU HSF

[llee]

I don't want to sound like an idiot, but I am absolutely clueless when it comes to the world of aftermarket gpu cooling. For CPUs, you have your sockets and screws, etc. I took one look at gpu hsfs and I have no understanding of their compatibility with graphics cards.

Do Nvidia and ATI have proprietary 'socket' sizes?
How do you know if a cooler will be compatible before you buy?
Do the newer GTX 400 series cards have hsf compatibility with the GTX 200 series cards?

Help!?

I need a 1-slot HSF cooler for a GTX 460 (stock)...
Idle Temp: 31
Load Temp (Furmark): 75

P.S. Any recommendations for a good VRM cooler brand?

 

[jchu14]

one slot? as in only one slot including the video card or one slot above the video card (so total 2 slots)? If it's one slot total, then I don't such cooler exists unless you count the hsf that can be mounted on the 'reverse side' like the Thermalright HR-03 series. or a cooler that's mounted parallel to the side panel like the Thermalright Spitfire