According to specs, the memory on the 4700 is pc2-3200, 240 pin, which is an early version of ddr2. I also know from past experience that the 915g Intel chipset only uses ddr2. That's why I said he might have to change to pc6400 for the asus, which uses the g31 chipset. He may also have to do a repair of his windows installation, or backup his files and format. I work at dell part time building servers, and worked at the old building next door twice that was closed last year, where regular computer systems were built. Dells aren't designed for upgrading, but his is doable with a little work, and the 305 watt power supply is adequate for a mid range video card.