Patriot Memory Signature Line DDR4 4GB (1x4GB) UDIMM Frequency 2133MHz (PC4-17000) 1.2 Volt - PSD44G213381 288-Pin Buffered Dual In-Line Memory Module (UDIMM) Frequency: 2133MHz (PC4-17000), Timings: 15-15-15-36 Capacity: 4GB (1x4GB) Voltage: 1.2V 100% Tested, RoHS Compliant, Limited lifetime warranty