This product is either discontinued or we cannot get that from suppliers.
Qnap RAM8GDR4K0SO2666, Internal memory type DDR4, 8 GB, Component for PC / server, Memory layout (modules x format) 1 x 8 GB, FF 260 pin SO-DIMM, Clock speed memory 2666 MHz.
These memory modules were designed and manufactured to ensure maximum performances in high end systems. Delivers superior quality, performance, and maximum compatibility with the computing systems.