Upgrade to F6 using @bios enable the options Clear DMI and clear PnP?

Go into the BIOS on the next boot and choose "load Optimized defaults"

F10 to save.

Let it post and detect all the hardware.


If you do not want to go to windows hit F12 and stick a memtest CD in the DVD and choose that to boot from.

Reboot

Change your settings to what you want. Make sure that the PCIe bus is set to 100Mhz!


Post and enter windows........


Then recheck if the PCIe slot is going X1