you can tell the rev "AKA version" of the mother board by looking at the ATI chip on the mother board
a rev 1 or A logic board will have the ATI Rage II GFX chip on it the rev 2 or B logic board will have a Rage Pro GFX chip. the rev 3 or C will have a Rage Pro or RAGE Pro Turbo.
there is a web site showing what each of the 3 rom chips look like i cant remember i think it is OWC.
im looking for the site that show's what the 3 diffrent rom chips look like but here are the numbers of the roms
* Rev. 1: $77D.40F2
* Rev. 2: $77D.45F1
* Rev. 3: $77D.45F2
ok here is the site with what each rom looks like
there is a drop down box so you can select wich rom to look at and each will show you the numbers some will look the same but you need to look at the numbers on the front and back of the rom chip to really make shure what rom it is
http://eshop.macsales.com/Tech/Load_Page.cfm?page=zifrommainpage.html
and here is the site showing a diffrent version of rom than the standard 3 rev's of rom's
http://www.maccetera.com/news/beigeg3.html
some times you can find out by the speed of the cpu and by the manufacturing date there is a lable on the back showing this info
also you can look on this site for info about the Beige G3's
http://www.everymac.com/systems/by_processor/powerpc750.html
