Dominick_1 :
couse i have it and it still works for my needs
Dominick_1
It's a lot of work to change a motherboard and for the Dimension 2400. the CPU, RAM, a video card will have to be added also- you can't reuse anything except the case and power supply. My suggestion is to set a budget and buy a Dell Optiplex 760 or other system that may use DDR2 RAM and a PCIe graphics card. You can do a lot with $100 or so.
If however you like the style of that era, you might fit a Dimension 8400 motherboard- at least the case looks to be the same. The 8400 can use a hyperthreading, 64-bit Pentium 4 up to 3.8GHz, and has a PCIe video card...