EK Water Blocks - EK-Quantum Vector² 4090 FE block (along with the backplate that is included in the set) is finely tuned to bring the best cooling to your GPU. It is
EK-Quantum Vector RE RTX 3080/3090 D-RGB - Nickel + Plexi – EK Webshop
Aluminum EK Fluid Gaming Water block for reference RTX 3080 and RTX 3090 GPUs – EK Webshop
Compatibility list for EK-AC GeForce RTX 3080/3090 D-RGB | Liquid cooling compatibility list | EKWB
EKWB Ek-quantum Vector Radeon RX 5700 XT D-rgb GPU Block - Nickel Plexi Open for sale online | eBay