It may work. If not, you can return it to Crucial. EDIT: your processor should support up to 64 GB DDR4-2666, or LPDDR3-2133.  I assume that you already have an SSD. If you don't and use only a hard drive, install an SSD as the boot drive. That will make your system much faster, a bigger difference than a RAM upgrade would make. Good luck.  
Dear Colleagues I am searching for days but can‘t find which RAMs to buy to upgrade to 64GB. Can you help please? I heard many RAMs don’t work and hence, need your guidance.  Many thanks in advance!   Charlie
Dell XPS 15 9570 Upgrade RAM