Going to pick up a PowerMac G5 Quad today. Was wondering if there was anything in particular I should look for? Specs: - Quad Model - 8GB DIMM (probably 1GB sticks) - Stock 6600 Card Seller indicates it works fine. I ask because these are liquid cooled and some experienced leaks as I am aware. The MR community has better sense of the signs to look for. Any help appreciated.