Just purchased this board to replace my Asus. Been a loyal Asus until now, but beginning to regret as I don't seem to get it to boot up. The unit stuccoed at Led Error Code 51 and then shutdown itself after a while. Using 2 units of Kingston KVR1333D3N9/8G memory. Tried playing around with the socket: using 1 & 2, then 3 & 4, resulting in same problem. Even tried putting just 1 into slot 1 and still the same. Anyone experienced this before or has any idea what to trouble shoot? Thanks