Possibly -- but not so many are required. To my knowledge they dont make 1.5GB DIMMs -- the mobo prolly has three DIMM slots with a total capacity of 3GB running at a slower speed or 2GB runnning at a higher speed. In either case, 2GB of memory is enough to ditch the RAID -- if all you're uisng it for is to augment the swap. The faster xfer rates are expected however I'm disturbed that your HDDs had difficulty keeping up with your optical drives (which are orders-of-magnitude slower) -- PIO/DMA? Let's keep in mind that this thread is dedicated to the "no expense spared computer" but even then, 3GB is more than enough to eliminate the need for swap -- for the time being.