Hello everyone I am having a problem the last update I did to my motherboard Maximus Extreme IV of the 4 sectors p67 pci exprees only recognize me first and I can not be croosfire as if he could before upgrading as well as the recognition of mentioned only 4GB memory instead of 8GB need to return my motherboard to a state of bios manufactures someone please help me.

Bios update: Maximus IV Extreme BIOS 3208.

Thanks for the help I hope to find the solution to my problem.