I picked up a G5 today for £5 - missing RAM and HD but a dual processor of some sort so worth a gamble. At home I popped in 2 sticks of RAM, connected a Cinema screen, crossed my fingers and hit the power. Yes - a bong! Within minutes I'd fitted a SATA drive and was installing Leopard, then came the updates - all seemless as it came with built in Airport Extreme (and Bluetooth). The machine was actually the Dual 2Ghz model with the entry level Geforce FX5200 - but at £5, no complaints from me. Then came the inevitable, once everything was installed and updated...I opened it up again to add more RAM, filled the slots and then..... no start up. Reseated all the RAM, took the extra sticks out, tried the first pair in alternative slots, reset PMU, removed the PRAM battery. And every time, the power light giving it's triple flash of "no memory banks detected." So (unless I'm missing something) it's yet another victim of fragile soldering at the memory slots - pushing in those extra modules broke the line. What a shame but in future, if you get a working Powermac G5 with 'adequate' RAM - upgrade it at your peril!