I have the same block on an X99 board too and looking to use it on an LGA1700 system.
I think we just need this backplate to make it compatible.
And on the EK website, Supremecy is listed.
EK-Quantum Velocity Backplate - LGA1700 is a backplate for EK-Quantum Velocity water blocks that allows them to be mounted on the new motherboards based on the Intel LGA 1700 socket. This is the only product required to convert your EK-Quantum Velocity CPU water block to an LGA-1700 compatible...www.ekwb.com
Good to know it will fit though.
I'm waiting on Raptor Lake but been checking also if I need a new block.
Probably going to stick with my Supremacy EVO if it works, going by reviews of the latest blocks it's not far off anyway.