945, 965 and 975 are the motherboard chipsets. By looking at that link you can start to understand things. Look around for the type of motherboard you need, like size (ATX, BTX, EATX etc) the type of chipset like 945, 965 that will match your socket, when you have narrowed down to a few, choose from options like 5.1, 7.1 channel sound, PCI-e or AGP and so on untill you find the board you want. Go to Gigabyte or Asus etc. website and match up the board to one of their products.
Look at the 965LT
board then compare it to a 965S3
from gigabyte. Both cost about the same.
Edited by sarahw, 18 January 2007 - 06:24 AM.