Directly cools the video cards core (GPU), graphics memory (RAM), and voltage regulator modules (VRM). Allowing you to achieve great temperatures along with the ability to reach higher overclocks or extend the overall lifespan of your card by running at below factory temps. Compatibile with GALAXY GeForce RTX 4090 Xingyao.Please check over the entire PCB picture after narrowing your selection to ensure compatibility. Compatibility based on these circuit board designs only. If you have any questions, please contact support for confirmation. The block is constructed of high-purity copper that is nickel electroplated to prevent oxidation. A high-flow design is used to allow multiple blocks to run in series. Top and bottom ports can be used to configure parallel or serial designs in multi-block setups.Block Material: Nickel Electroplated High Purity Copper / Acrylic. Backplate Material: Black Anodized Aluminum (not in contact with coolant).