QNAP RAM-2GDR4A0-SO-2400 2GB DDR4, RAM 2400, MHZ SO-DIMM 260 PIN A0 VERSION, DDR4 SDRAM, Memory Voltage 1.20 V, Memory Speed 2400 MHz. Designed for their TVS-951X 9-Bay NAS Enclosure, the 2GB DDR4 2400 MHz SO-DIMM Memory Module from QNAP is a single RAM module that will let you upgrade the overall memory capacity of the TVS-951X.