This product is either discontinued or we cannot get that from suppliers.
Kingston KCP426NS8/8, RAM Module, 8 GB, DDR4 SDRAM, 1.20 V, 2666 MHz, Standard DDR4-2666/PC4-21300, Non-ECC, CAS Latency 19, 288-pin, DIMM.
Kingston memory is designed, manufactured and rigorously tested to meet the exact specifications of each brand name system. It's guaranteed to be compatible.