Kingston Unbuffered Valueram Sing KVR26N19S6/8, 8GB, Speed 2666MHz (PC4-21300), Non-ECC, DIMM, CAS Latency 19, Form Factor DDR4, 1R (Single Rank), 288 Pin, 1.2v. This document describes ValueRAM's KVR26N19S6/8 is a 1G x 64-bit (4GB) DDR4-2666 CL19 SDRAM (Synchronous DRAM), 1Rx16, memory module, based on four 1G x 16-bit FBGA components.