I just got an Nvidia GF4 Ti4200. My core couldn't oc to 300 so i decided to see what kind of cooling they used. I squeezed the plastic tabs on the back of the card to get the HSF off then i pryed off the hsf from the core itself. They had some kind of yellow sticky thermal adhesive that didn't look like it was cooling too well. Anyways, i scraped all of that off and since i didn't have any thermal adhesive is used thermal grease (artic silver 3). My question is, is it ok to use thermal grease on the GPU? I would assume it would be fine. The only thing is that the grease has no adhesive properties, but the plastic tabs are enough to hold it in place right? I can move the hsf around slightly however which kinda freaked me out.