The EK-Pro CPU WB sTR Rack - Nickel + Acetal is a dedicated server grade water block with 1U chassis compatibility that is tailor-made for AMD Ryzen Threadripper processors. 1U rack compatibility is achieved through the use of two G1/8"-threaded side ports that enable a smaller vertical footprint. Aside from 1U compatibility, the primary goal in designing the new EK-Pro CPU WB sTR Rack - Nickel + Acetal water block was to cover the entire IHS of HEDT AMD Ryzen Threadripper processors and to improve the cooling performance. A dense micro-fin structure that counts 91 wide grooves fully covers the CPU dies that are located below the IHS so they are cooled more effectively. The top is made from CNC-machined durable POM Acetal. Every EK-Pro CPU WB sTR Rack water block comes with a precisely machined copper base (sometimes referred to as 'cold plate') which is made from the purest copper available on the market and is treated with nickel electroplating. EK-Pro CPU WB sTR Rack - Nickel + Acetal comes with a pre-assembled error-preventing mounting mechanism that is installed directly onto the SocketTR4 mounting holes. The result is a perfect installation that results in optimal performance every time. This also means the water block is out of the box compatible with AMD's server type Socket SP3 motherboards. With such a mounting solution, the user does not need to remove the motherboard from the case and so has a hassle-free installation procedure of the new CPU. CPU socket compatibility: - AMD Socket sTRX4 - AMD Socket TR4 (Socket SP3r2) - AMD Socket SP3 Enclosed: - EK-Pro CPU WB sTR Rack - Nickel + Acetal Water Block - TIM / thermal grease: EK-TIM Ectotherm (1g)