Dual G5, 2.0 GHz M9032LL/A PowerMac7,2 Memory: DDR, 400MHz (PC3200). I have *stacks* of DDR 400 memory. The system doesn't recognize any of it. Is something like just ordering new stuff from OWC my best option? (http://eshop.macsales.com/item/Other World Computing/3200DDR2GBP/) I'd hate to have to buy more DDR 400 ram when I have a shoebox full of the stuff. Why wouldn't this system acknowledge the RAM? I tried unplugging it & letting it sit, resetting PRAM, resetting SMC, re-seating the RAM, moving the sticks to different slots, clean install of Mac OS X, etc. It obviously needs more than "just" PC3200 RAM. The stock install had two sticks of 512MB, PC3200/CL3. What's the technical details of what it really needs? Low density?