New
#11
You do not currently have an ATX board, but a micro-ATX. Make sure you get either a micro-ATX replacement, or that a larger ATX MB will fit your case.
btw, socket 775 is the pin-out that your processor uses. You must match the processor pin-out to the motherboard socket. CPUs come in all shapes, sizes and pin-outs.
Pinout - Wikipedia, the free encyclopedia