When im setting the fsb higher then 360, the pci-e speed gets down to x1 and my gfx performance sucks.

I have tryed to 2 oficial bioses and the beta bios, but no change(at a point i could have x16 until 399, but can't remember when that was)

i have also tryed setting the pci-e to 100 and 101 MHz with no change

Other then me having this problem or a solution for me?