Its very easy to "kill" a card doing this. The first leap and most touchy of course is removing the old HS without taking a big hunk of the chip with it. I used the cold methode and have others V5 users but dont do the same with a GForce. Tennmax has good info on it
right here.
Easiest and most commin way is to get adheasive on the hair thin wires leading into the memory or the main chips. Even with minimal conductivity a short here will kill the card...but fear not with a very in depth cleaning you can lazerus this mistake. It took me five reinstal trys and getting the toothpic alcohol and cloth to clear up this one.
Next is using the pins that come with the blorbs,they dont work worth poop and they dont line up too the holes on the V5. If you force them your blorb will arch up away from the chip and your chip will burn up. Also if you use the good stuff (Artic Silver Adheasive) read the instructions valuable info in there too. You can use the frag tape but that just never gave me a warm fuzzy feeling.
Finnaly it's an expensive card your about to pry stuff off of so basicly anything above is there for you if you are nuts. That is to say if anything goes wrong dont blame me,I didnt make you do anything. If anything I hope I made you just a little more nervous about it and you do a lot of reading and thinking before you try it.....Best of luck to ya!
