The board you mention has like 15 different versions. Look at this page on MSIs website: http://us.msi.com/index.php?func=prodarchive&maincat_no=1
Your board is a socket 478, also it uses the 845G chipset. Check out the individual boards to see which one is yours, or let me know once you run CPU-z and check the motherboard tab. it will also tell you.