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Just bought my second G5 Quad, a single pump Delphi one. Immaculate, not a speck of corrosion, plugged it in at the seller's house and it chimed, which was good enough for me, and I took it. Got it home and was rather unsurprised to find that it no longer posted, and was throwing CPU overtemp...

Alright, I eliminated the logic board as a potential cause While sitting around brooding on it, I had a clever idea: remove the LCS and CPUs from my quad. Take the heatsink and 2.5ghz card from my air cooled DC, slap it in the top slot of the quad, see if it boots. I did that, and it started...

Hell, in April 2007, less than 9 months after the G5 ceased production, you could order a Mac Pro with dual x5365s, each of which had a TDP of 150w, and they did absolutely fine air cooled.

If I do wind up going the air cooled route, I'd be glad to send you the LCS. The cards I'd like to hang onto, since one is already sitting in my DC, and it'd be nice to have a spare... I do have a 3rd machine (a DC 2.0 with a bad PSU) that I could yank the CPU from, if you want the LCS and two...

My two new 2.5ghz 970MP boards came today. I put them in to the exact same result. I took one of the old CPUs and transplanted it into my dual core 2ghz system, it passed calibration and runs very nicely. Im bout to say fuck this and just convert it to air cooled

Got the logic board out, repasted the northbridge as well as the ServerWorks chip (whatever that thing is) that's under the big black heatsink at the top front of the board. Checked and cleaned the backside fan Got it all back together and it's the same. Bongs, then a few seconds later the...

Lapped the blocks with 1500 grit sandpaper, removed the pointless o-rings, repasted CPUs with different compound, spent 20 or 30 minutes trying to burp any remaining air out of the LCS (there was none), started 'er up, no difference. Removing logic board now to repaste northbridge/check backside fan

In the beginning, when it was only one CPU that ran hot, and the machine wasn't overheating/restarting, I swapped the CPU cards and the problem stayed with the block. I've swapped them back and forth a few different times. After the first LCS rebuild, I couldn't get into Leopard long enough to...

Back in December I bought G5 quad off craigslist At a glance, it was a mint unit - clean as hell, hadn't leaked a drop of coolant. Got it home, tore it apart - LCS, CPU cards, logic board and PSU were all immaculate. After a fresh install of Leopard, I installed iStat and started monitoring...