Hi, I've been struggling with this issue for a some time. My PCI-E x16 bus is working in x2 mode. Since my second x16 bus is working in x8 mode I know something is up with the first bus. I tried everything - full reinstall of OS, changing settings in BIOS ( unfortunately there's no option to switch the bus to x16). Does anyone have any ideas? Or should I get new mobo? Thanks