|Inside your Computer - Your Hardware Explained|
buying a computer or changing your motherboard then you will need to
determine your needs.
important question is what are you going to use the computer for? There is
no point in buying an all singing and dancing system if all you want to do
is surf the net, but do remember that 6 months after buying the system you
may decide to use it for other things, and if it is not upgradeable, then
you could be looking at an expensive change.
So to round up, make sure that when buying, even if all the components are onboard that you have free expansion slots so that the system is future proof. An AGP port or PCI-express port (allows for graphics card changes) and free PCI and PCI-E slots (used for adding expansion cards), support for Pentium 4 or Athlon 64 processors, and DDR or DDR2 memory are some of the important, and presently modern items that you would look for.
Always research and read modern reviews and never buy 2nd hand as you will not know what you are getting.