My Imac G5 came w/ 512mb Memory. What would be better and faster, matching 512's to get the 128 bit path, or add w/ the 512, a 1Gb non matching at 64 bit path.
The performance difference between 1GB matched and 1GB of non-matched does exist - but - more memory (1.5GB) gives you better overall results than having 1GB matched. Especially so for apps that can use that extra memory and in such cases, the 1.5GB is night and day faster than just 1GB even wih interleaving.