This is my RAM CM3X2G1333C9DHX
Yes I do have access to behind the motherboard, so I would be able to access it easily.
That is a very old ram stick, just check the voltage required, 1.8v for 1600Mhz!
I would really recommend you to change it for something better as it could cause stability issues with the new mobo/cpu.
You can get better ram dimms for $80Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1866 Memory
($79.05 @ Newegg) Memory: Crucial Ballistix Sport 8GB (2 x 4GB) DDR3-1600 Memory
($74.99 @ Micro Center)