390 power supply does not support 77W  I7 3770 Chipset H61 seems to. [URL] [URL]   ALL drivers are in a cab file   No guarantee the Bios microcode is up to date. A14 seems to be the latest [URL] You cannot jump from A00 to A14 in one step.        
I just got an i7 3700 and i would like to know what bios updates would I need to apply for it to work on my Optiplex 390
optiplex 390 bios