i just found out today that my computer sucks. i have a dell 4400 from last april with a p4 2.0 northwood and 400mx of bus (845d chipset). and have 768 memory of ddr sdram type. i have 250 watt power supply i am wondering what mother board should i upgrade to? also i heard somewhere that with dells if you replace the motherboard you need to replace the power supply. is this true? thanks in advance.