The original line of VGA Silencers (current is rev. 3) will work on the 9800 pro without a problem. If you want to move on to the new line of VGA Silencers, you need the ATI Silencer 1. The other models won't fit it. I'm currently using the VGA Silencer rev.3 (lapped, was rough base when received) and it cools it enough so that I can run the card at XT speeds.