Great summary Andreas. I hadn't even had a chance to go over this yet (and now I don't have to).
The Sb800 SATA controllers are 3.0. What are the P5s?

With an SB800 series Southbridge we also gain additional SATA controllers (six total).

Very interesting comparison.
W/O SB - X4+X4+X1 PCIe 2 SATA
W SB X4+X4+X1+X1 PCIe 6 SATA and PCI

[ Edited by Jim on 2011/3/21 4:46 ]

[ Edited by Jim on 2011/3/21 11:04 ]