@Edward, you are 100% mistaken about the Panasonic and Delphi / Cooligy LCSs: it was the OTHER way around: the early 2005 liquid-cooled systems are the ones that gave the G5 a bad fame of leakage, which used Panasonic radiators, which is the reason you almost never see 2.7GHz models that still live, while the late-2005 Quad replaced that with Delphi ones (both version 1 and 2).
Both version 1 and 2 are extremely reliable, which is why so many Quads still exist today (my own included), and most existant 2.7GHz G5 owners today, who are already so few, saved their machines precisely by replacing the faulty Panasonic LCS one with a Delphi one (same one found in the Quads).
People debate which version (1 or 2) is better, too, but there’s no existent reliable report so far. But it’s speculated version 2, as the numbering suggests, is a revision for even further reliability (perhaps by evening out the cooling for each processor contained by having 2 pipes).
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