I will have to wait till my 2nd 2.7ghz G5 comes in, do some testing/temps on the LCS, then drop in some 2.0CPUs to see if the logic board will take them.
Thing was that the LCS and the Passives were reading around the same temps, but i think this was because the board thinks the LCS is still used, though the Passives are in it now... Readouts on temps were slightly lower on the Passive, but maybe because the LCS in it was failing? Either way, stay tuned as I blow up this G5 for experiment!