Did anyone here ever apply arctic silver 5 to replace the stock thermal paste on your GPU? I've seen someone said it can improve the cooling, so lower the fan noise. I have a Sapphire 7950 Mac Edition card. I would like to get the most performance from it, but lower the fan noise as much as possible after OC. Just wonder should I try this. Anyone have experience on this? Good or bad? I know it's possible to kill the card. Of course I am not looking forward of that. However, if I know there is a possible good return, I don't mind to take the risk. I have a backup graphic card anyway if anything goes wrong.