Did you try your second bios chip?
Did you try a single stick of memory in all of your grey memory sockets, individually? To rule out the possibility of bad memory channels?
Have you made sure your PCI slots are turned on?
Have you tried changing your QPI LL jumper to see if that makes a difference?
Have you tried turning on/off the LN2 mode jumper?
Can you use a DMM to take voltage readings from the readout points to verify voltage is at the correct levels?
Did you test your cpu in your friend's motherboard?
Did you test your friend's memory? Did you test your memory in your friend's cpu?