Mobo Series (For Non HDMI) X801054 001 to 004 are beta 1 X801054 005 to 007 are beta 2 X803600 008 up are final
btw 001 to 004 had the Alpha version of the CPU. 11 board revisions in 9 months. July - August 2005 saw 008-011. I guess the engineers didn't get much sleep. As everyone knows the GPU was/is the biggest problem. 11th rev by retail release.