I had looked at the Tyan boards and they looked great. One thing that confused me though is, I am looking for 2 PCI express x 16 slots and the Tyan boards list the slots like:
It means 1 will be at full 16 speed and the other runs at 4 speed. Tyan has 1 board that runs at 16x and the other at 8x speed and another board that has both running at 8x speed.
The only one I saw that let both run at 16x was for an AMD Operton, but it also had 2 PCIe 16 (x4sig).
Believe same goes for the SuperMicro mobo's also. Either they cut spped in half for both PCI Express x16 or 1 will run at 16 signal and they other 4 signal.