This document describes Value RAM's KVR26N19S64 is a 512M x 64-bit (4GB) DDR4-2666 CL19 SDRAM (Synchronous DRAM) 1 Rx 16 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 12V Each 288-pin DIMM uses gold contact fingers &8226; Power Supply VDD 12V Typical &8226; VDDQ 12V Typical &8226; VPP 25V Typical &8226; VDDSPD 22V to 36V &8226; Nominal & dynamic on-die termination (ODT) for data strobe & mask signals &8226; Low-power auto self refresh (LPASR) &8226; Data bus inversion (DBI) for data bus &8226; On-die VREFDQ generation & calibration &8226; Single-rank &8226; On-board I2 serial presence-detect (SPD) EEPROM &8226; 8 internal banks; 2 groups of 4 banks each &8226; Fixed burst chop (BC) of 4 & burst length (BL) of 8 via the mode register set (MRS) &8226; Selectable BC4 or BL8 on-the-fly (OTF) &8226; Fly-by topology &8226; Terminated control command & address bus &8226; PCB Height 123” (3125mm) &8226; Ro HS Compliant & Halogen-Free