4GB PC4-17000 2133MHZ DDR4 Cas Latency: 15 Voltage: 1.2V Buffered/Registered: Unbuffered Features: 2133MHz DDR4 288-pin DIMM architecture: Matches exact Motherboard specifications. 1.2 Volts: Low power requirements offers operating cost savings and lower heat output. Fully JEDEC compliant: Meets the industry standards set by the semiconductor industry for memory technology.