Picked up a used Gigabyte HD 4850 with Zalman aftermarket cooler for $10. The Zalman cooler kept temps at just 53°C — massive difference from my previous HD 3850 that hit 106°C! Tested on a Core 2 Duo rig with GTA SA, CoD4, Crysis and more. Full video here: https://youtu.be/0ORqQPk7kjs
If there's something you want to show in detail, I would suggest making a separate video specifically for that, and then saying, there's a longer video to show you exactly what I did over here if you're interested, otherwise, just keep watching.
This is also very helpful if it ends up being something that's very similar to something else that happens in the future, because then you can reuse the one DIY how-to video as a reference point for all of the future videos.