Qnap DDR3-1600 4GB 240-Pin 1600MHz ECC Server Memory (RAM-4GDR3EC-LD-1600) Capacity: 4 GB Memory Type: DDR3 SDRAM - DIMM 240-pin Upgrade Type: System specific Type: DDR3 Capacity: 4GB Speed: PC12800 1600MHz Pins: 240pin Compatibility: TS-EC879U-RP, TS-EC1279U-RP, TS-EC1679U-RP, TS-EC1279U-SAS-RP, TS-EC1679U-SAS-RP