That board supports both PCI-E 2.0 (PCI-E 2.0 is backward compatible with PCI-E 1.0 ) and E4500, so dont worry
Maziar can you tell me how you got that. I was looking at manufacturers product pages on some MOBO's and didnt see anything about it being a PCIE 2.0 Board.
Are you saying it is a 2.0 board or that it will run a 2.0 card as the cards are backwardsly compatable.
If its the former can you let me know where it shows this so i can tell for myself in future.