I'd replace the stock HSF. Warranty-shmwarranty
🙂 If the card has lasted you a year without any problems, it will most likely not have any problems from here on out.
http://www.voidyourwarranty.net/review/review.php3?r1=diy/vidcardcooling/index.php3
I think ATi still epoxies their heatsinks, so:
Method for removing epoxied HSFs.
1. Remove the fan.
2. Get a can of compressed air.
3. Spray the contents upside down onto the heatsink for 5 secs.
4. It should be frozen, so get a thin plastic card.
5. Put the card between the GPU and the HS.
6. Get a thin flat screwdriver.
7. Put the screwdriver between the card and the HS.
8. Twist the screwdriver.
9. If it does not come off easily, try doing it on each corner.
10. Clean up with 70 or 91% alcohol. If you need something stronger, acetone will do. Not the scented nail polish remover crap, the clear acetone. Then clean up again with alcohol.
11. Put a new HSF with AS/AA epoxy on.
If that video card has DDR ram, you might want to put some ramsinks on as well.