Hi, I recently got a Power Mac G5 Quad and upon taking it apart I realised that the grey CPU cover screw/pin was not there, meaning the CPU had been opened up before, possibly for a repair. I was wondering if anything has been modified/replaced visibly or not? This is a UK model. I, personally, don't have a clue. The LCS has the Delphi logo on it. I thought the Delphi LCSs were the unreliable ones that were prone to failure and the Panasonic ones were newer and more reliable? If this is a Late 2005 G5, why doesn't it have the Panasonic LCS? Also, I have heard about dual and single pump LCSs. I think this is the dual pump. Which is better? And why were there two LCS models? (is one a newer revised version??) Thanks everyone!