Hi Guys, A while back I bought myself a X79 system to play around with. It sported a 4930K with Rampage 4 Formula and 16Gb of 1866 4x4. No issues there all works well. I purchased a 3930K off eBay a while back (return policy expired) just for shits n giggles and it's not booting. Now when I place my 4930K back in, she's all sweet. Boots up. As soon as I put the 3930k back it, no boot. There is a debug LED and the number its stuck on is 19. I have read the manual and it saying "Pre-Memory PCH Initialization is Started". This is as far as the boot process is going. Things I have tried: 1 stick of memory in different slots, changing pci-e slots with GPU and cleaning the back of the CPU contacts. Every time it will display "19" on the debug LED and wont go any further. Is this CPU DEAD?? Any input would be great. Cheers.