I have one of the original 1.0x BH6 boards, no idea what bios it has right now, but I can CONFIRM that it works with coppermines. I am running a 550e FCPGA @ 733 @ 1.6 w/ an MSI Slocket, no problems. Now, it's not the best board for overclocking, since it jumps from 100 to 112 to 124 to 133 and only has a 1/3 pci multiplier, but it'll do the job.
Cheers,
~bex0rs