Has anyone personally ever got a noticeable benefit from DIMM interleaving on PCI PowerMacs? My 9600/G4 450 is a temperamental beast that took a while to get in hand, and installing a batch of matched memory from OWC definitely improved things. It now has a massive 768MB (enough RAM to do most things, not too big to hit OS limitations) and is relatively stable. Working out which slot to use for each particular PCI card is a long job with six slots...