ValueRAM's KVR26N19S6/4 is a 512M x 64-bit (4GB) DDR4-2666 CL19 SDRAM (Synchronous DRAM), 1Rx16, memory module, based on four 512M x 16-bit FBGA components. 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.
Kingston Technology ValueRAM KVR26N19S6/4. Component for: PC/server, Internal memory: 4 GB, Memory layout (modules x size): 1 x 2 + 1 x 4 GB, Internal memory type: DDR4, Memory clock speed: 2666 MHz, Memory form factor: 288-pin DIMM, CAS latency: 19