I have a similar situation with my Shuttle SN95G5v3 with 3800x2. A Shuttle tech told me that board does not support the 3800x2, only 4200x2 and up but he suggested I update the bios here http://www.shuttle.com/share/f...q/to...flash%20SOP.htm
It recognizes the processor now but nVidia ethernet drivers will crash system upon install. I just got a reply from the tech as I type this post, he said "The problem is when the bios is updated it also changes the onboard LAN’s firmware. This sometimes happens. The only work around is to do a fresh install of Windows and then install the motherboard chipset drivers again."
Sweet! if this works were in business.