Water blocks are specialized cooling devices used in computer systems, particularly in high-performance setups like gaming PCs and servers. They work by transferring heat away from critical components, such as the CPU or GPU, using a liquid coolant. This helps maintain optimal operating temperatures, preventing overheating and ensuring better performance. Typically made from materials like copper or aluminum, water blocks feature a series of channels that allow the coolant to flow through. As the liquid absorbs heat, it is pumped away to a radiator, where it is cooled down before circulating back. This efficient cooling method is popular among enthusiasts and overclockers.