EK-Quantum Vector RX 6800/6900 is a 2nd generation Vector GPU water block from the EK Quantum Line. It is made for graphics cards based on the latest AMD RDNA2 architecture. This water block fits most reference PCB designs of the Radeon RX 6800, RX 6800XT, and RX 6900 GPUs. EK-Quantum Vector RX 6800/6900 water block for reference AMD Radeon RX 6800 and 6900 GPUsEK-Quantum Vector RX 6800/6900 water block is compatible with most reference design Radeon RX 6800, RX 6800XT, and 6900 graphics cards. The Vector water block directly cools the GPU, VRAM, and the VRM (voltage regulation module) as a cooling liquid is channeled right over these critical areas. The water block is in contact with power stages as well as Inductor chokes to maximize cooling and minimize the chances of coil whine. These newly developed water blocks feature optimized flow paths that reduce hydrodynamic instabilities and vortexing (dead spots) inside of them. The EK-Quantum Vector Series water blocks use an Open Split-Flow cooling engine design, which proved to be a superior solution for GPU water blocks. It is characterized by low hydraulic flow restriction, meaning it can be used with weaker water pumps or pumps running on low-speed settings, and still achieve top performance. The jet plate and fin structure geometry have been optimized to provide even flow distribution with minimal losses and optimal performance when used in any given coolant flow orientation. Fin array is populated by 35 microfins with 0.6mm wide microchannels that provide optimal cooling performance, without unnecessary flow restrictions or clogging hazards. This water block comes with a single-slot bracket PCI-E expansion for a slick and elegant look. The block is slightly thicker than one slot, to avoid having a steel bridge-plate between the VRM and core parts of the block.The base of the block is CNC-machined out of high-grade nickel-plated electrolytic copper, while its top is CNC-machined out of durable black POM Acetal. These 2nd generation Vector GPU water blocks also feature acetal terminals. The watertight sealing is ensured by high-quality EPDM O-rings, while brass standoffs are already pre-installed and allow for a safe and easy installation procedure.D-RGB lighting on EK-Quantum Vector RX 6800/6900 D-RGB water blockThe aesthetic end-piece is housing the addressable D-RGB LED strip. This water block boasts a total of 6 individually addressable D-RGB LEDs, and it is compatible with popular RGB sync technologies from all major motherboard manufacturers. The arrow marking on the 3-pin D-RGB LED connector is to be aligned with the +5V marking on the D-RGB (addressable) header. Backplate for the 6800/6900 water blockEK recommends the purchase of a retention backplate, which improves the overall aesthetics of your graphics cards, and also provides additional passive cooling for the GPU core and backside of the printed circuit board VRM and VRAM sections.Enclosed:- EK-Quantum Vector RX 6800/6900 series high-performance water block- Mounting mechanism with screw-in brass standoffs- Necessary mounting screws, nuts, and washers- 2x Nickel plated brass plug G1/4- EK-Loop Multi Allen Key (6mm, 8mm, 9mm)- Thermal pads- Thermal grease EK-TIM Ectotherm (1g)Technical Specification:- Dimensions: (LxHxW) - 283x139x16.5mmCompatibility- AMD Radeon RX 6800 Reference Design- AMD Radeon RX 6800 XT Reference Design- AMD Radeon RX 6900 XT Reference Design