QNAP - RAM-4GDR3L-SO-1600 - 4GB DDR3L RAM, 1600 MHz, SO-DIMM
Part number:
RAM-4GDR3L-SO-1600
Price:
For TS-x51, 451U, x53, x53U series (suggest to use the same size memory for both memory slots) and TVS-x63 series