Hi i recently got a HIS Excalibur 9550 for one of my older pcs and i was wondering what cooling system would be best for the card ? I want to over clock it to get it bit better. The thing is this card has just aa heatsink and gets verry hot so im not going to overclock till i get new heatsink + fan system. Is there anyway to not have to remove the existing heatsink but add aditional cooling ? The reason i ask is because i dont really have experiance in this and i dont want to break the card taking the heatsink off.