Before I make this purchase, I wanted to make sure I wasn't making a false assumption. I am upgrading a PowerMac G4 MDD from 1GB RAM (in a 512 + 256 + 128 + 128 MB setup) to 1.768 MB (as a 512 + 512 + 512 + 256 MB). Is that latter combination feasible? I've not seen that specific amount ever in the past but I have no found no Apple documentation online to warn me that it would not work. I am simply hoping to save some cash and not grab a third 512 MB stick. Thanks for the input.