I have a similar issue with this mobo too. It only recognizes 5 pci express x1 slots and does not recognize the pci express x16.
I have checked the gpu and it's cabels: 100% working. How can I make the pci express x16 work?
Thank you very very much
Try this bios setup
- Peripherals >> Initial Display Output >> IGFX
- Peripherals >> Above 4G Decoding >> Enabled
- M.I.T >> Max Link Speed >> Gen2
- Chipset >> Internal Graphics >> Enabled
Then you need to plug the display (monitor) cable to Onboard graphics port and don't forget to connect the PSU's Molex (4-Pin) power cable to both PCI-E power connectors on the motherboard.