This is an old Dell OEM 9800 Pro I have replaced with an X1950 Pro. It's working it's just got old thermal paste that I want to replace the thermal paste, but this is my first venture into GPU maintenance. The main problem I have is the second push pin holding the heatsink down will not come off and I'm afraid I'll break something. I'm guessing removing/replacing the TIM is the same as it would be on a CPU, but I'd rather get help and get it right than do something stupid. I wanted to use some AS5 or the remainder of the Antec Formula 5 I have (suggestions on TIM please). I also would like suggestions on how best to clean the fan. I used a small vacuum with extension to get it as "clean" as it is now.