Question about HP Z2 Tower G4

Hello everyone, I wanted to expand the RAM of this machine from 32 to 64 GB (2x 16GB additional). I bought the HyperX Fury (2x, 16GB, DDR4-2666, DIMM 288) for this, which should actually fit from the specifications, but didn't work in this machine. Can anyone tell me which RAM will fit it? Thank you very much.