I read where that the new HB bridge has some pins disconnected indicating to the GPU that it is a HB bridge and to bump the transmission speeds up from 400Mhz to 650Mhz, also it looks like the traces are laid out different possibly to reduce noise/in...
im currently having the same issue, lane 4 flashing, after I installed another 32GB ram, same kit as already installed, running a 950pro M.2 SSD, I have nothing in slot 4 as well. ( although the m.2 shares lanes with slot 4 i believeare you getting a...