Specifications: DRAM Module: RAM Type: DDR4 DIMM Type: U-DIMM Frequency: 2666 CAS Latency: CL19 Capacity: 4 GB Rank: 1Rx8 DRAM: 512Mx8 Voltage: 1.2V PCB Height: 1.23 inches Pin: 288 pin Note: Picture is for reference only. Actual product appearance may differ depending on the model. Operating Environment: Operating Temperature: 0°C (32°F) ~ 85°C (185°F)