Take a look at the cpu. If it's a tbird, it won't have any L2 cache chips, plus it will have a little shoe with a wing drawing on the pcb signaling it's a tbird, otherwise it's a regular athlon. For info on your board check MSI's site
www.msi.com.tw If it's regular athlon you won't be able to overclock as much as the L2 cache and the core to some extent will limit your overclocking. And lastly, to overclock you will need what is called a "goldfinger" card that plugs into your athlon on the top (the case on the cpu will need to be removed to expose the "goldfinger") that will then let you adjust mutliplier and voltage. For more info on Amd chips and Amd stuff in general check out
www.amdzone.com