There are four chipsets starting in 845PE:
Intel® Desktop Board D845PEBT2
Intel® Desktop Board D845PECE
Intel® Desktop Board D845PEMY
Intel® Desktop Board D845PESV
If you tell me which one it is I can find you a link to the bios flash utility or you can look for yourself on
http://downloadfinder.intel.com/scripts-df-external/Support_Intel.aspx. It's a Desktop Board.
Try CPU-Z:
http://www.cpuid.com/download/cpu-z-131.zip.