Hi Folks,
              For Asus Z270-P mobo user if SMOS not working and giving PCIE Error or No Display after boot. Use below setting


 - Go Advanced ----> System Agent (SA) Configuration ----> Enable "Above 4 G Decoding"

(DMI/OPI CONFIGURATION --->DMI MAX LINK SPEED will stay at AUTO! or GEN2 Dont change these..)

(PEG PORT CONFIGURATION ---> PCIEX16_1 LINK SPEED will stay at AUTO ! or GEN2 Dont change these..)

Go back to Advanced, then PCH CONFIGUTATION ---> PCI Express Configuration----> change PCIe Speed to "GEN1" must be GEN1 . Auto and GEN2 do not working for SMOS.




Rebel
Kudos