This Industry Standard 8GB DDR4-2666MHz Single Rank Unbuffered 1.2V 288-pin CL17 UDIMM. Adding additional memory is the best way to increase the performance of your system. All our memory is built to strict JEDEC standards to meet or exceed the Tier 1 OEM's factory requirements. SpecificationsForm Factor: UDIMMMemory Size: 8 GBMemory Speed: DDR4-2666MHzMemory Voltage: 1.2VPins: 288Rank: SingleSpeed: 2666MHzTechnology: DDR4Weight: 0.75 lbs- SKU: SYBA144422