That's easy. The Rev of a board has nothing to do with were it will work on 8x or not.
My 9700 works just fine being a Rev1 on 8x.
My bugs are not 8x related. Just Gbay bugs.
Intel has stated the 875 does not have this issue.
Compaq Presario CQ60-215DX
AMD 64 Athlon X2 @ 2GHz (QL62)
15.6 inch HD WideScreen
Nvidia 8200M-G 895mb
2Gig system ram
250Gig SATA 5400rpm HDrive