8GB (1 x 8GB) DDR4 2666MHz DIMM System Memory NTBSD4P26SP-08 is a 1G x 64-bit (1R8) or 512M x 64-bit (2R8)DDR4-2666 CL19 SDRAM (Synchronous DRAM), memory module,based on eight 1G x 8-bit or sixteen 512M x 8 FBGA components per module. The SPD is programmed to JEDEC standard latency DDR4-2666 timing of 19-19-19 at 1.2V. Each 288-pin DIMM uses gold contact fingers. Memory Capacity 8GB (1 x 8GB) Memory Type DDR4 Module Type DIMM Memory Speed DDR4-2666MHz Pin Configuration 288-pin Registered/Unbuffered Unbuffered Error Correction Non-ECC CL-tRCD-tRP-tRAS 19-19-19-43 Heat Sink None Working Voltage 1.2v