pci express help

i have a dg31pr, intel motherboard. on the site it says that its bus config is pci express 2.0. http://ark.intel.com/Product.aspx?id=30815 . look at revision. but when i put my 4890 into there, it runs at 1.1. i havnt updated the bios since i bought the mobo a year ago or so. i cant find anything in the bios, and it is supposed to set it at what the card and mobo are capable of.if i have to update my bios, how do i go about doing it on intel boards.im only used to gigabyte and asus' EZflash