Bought in error from Scan, waited too long to return it, so now I'm stuck with it.
Link here, and can provide a receipt for warranty if needed
https://www.scan.co.uk/products/16gb-1x16gb-samsung-m393a2k40cb2-ctd-ddr4-server-ram-pc4-21300-2666-ecc-registered-cas-19-19-19-sing