Myrinet on Tyan-2720 motherboard

Has anyone successfully used Myrinet with Tyan 2720 motherboards?  If
so, was there anything unusual you did to get it to work?  Which PCI
slots were the Myrinet boards in?

We're having trouble with Myrinet on a small cluster based on Tyan
2720's.  I've seen Myrinet cards show an extreme sensitivity to which
PCI slot they are in (another cluster gave consistently incorrect
results for HPL, until we moved the Myrinet cards to a different but
supposedly equivalent slot), and I've seen some BIOS issues on this
motherboard.  Both lead me to suspect that the Myrinet problems we're
observing may have as much to do with the motherboard as the Myrinet.

Thanks!

dbr
-- 
David B. Ritch
High Performance Technologies, Inc.