Qnap RAM-8GDR4A0-UD-2400, Kit Configuration 1 x 8 GB, Speed PC3-19200 (2400 MHz), DDR4, 288-Pin DIMM. The 8 GB 288-Pin U-DIMM DDR4 RAM Module from QNAP is designed to run at 2400 MHz frequency. The 288-pin unbuffered DIMM module is compatible with the TS-x73U and TS-x73U-RP Rackmount NAS CPU series.