You can get an Intel btx 965 chipset board with 4 memory slots at buy.com for around $80. Btx boards are scarce, so selection is limited. I would remove your board and note the standoffs and whether it slides in or screws on. Some dells simply slide into a groove and lock in place. You should be able to use a non dell atx power supply, but check at the dell forums first. With the 965 chipset, you can upgrade the cpu to a 1066 fsb core2 duo later.