The best test is just use the computer how you normally would and just see how it goes.
It's always a good policy to "Don't fix what ain't broken". Right? This especially applies to drivers. A lot of gamers update and keep their video card drivers current, but besides that, just leave stuff alone.
Not related, but did you ever get your networking or internet problem solved?
EDIT: You need to go back into the BIOS and set your settings again, clearing the CMOS should have set everything back to defaults. And it just dawned on me, could that of been the problem? Is your RAM not stable when you set it to the 1600mhz xmp profile 1? I wonder.
Set your RAM to what it is supposed to run at(1600mhz), and see how it goes. Leave all the other settings alone, even the "extra" screens. Let me know if anything happens, we could run memtest86+ and check the RAM.
Edited by Ferrari, 26 September 2009 - 12:35 PM.