As data centers push the limits of computing power, the need for advanced cooling systems has become more urgent. Server racks are now reaching power densities of over 250 kW, which means they generate massive amounts of heat. Traditional cooling methods that combine liquid and air are becoming less effective because they leave a significant portion of the heat to be managed by air systems, which are expensive and complex. For example, at 250 kW, a system that splits cooling 70% liquid and 30% air would still leave 75 kW to be cooled by air — a burden most data center operators are unwilling to accept. To address this, industry experts are turning to near-total heat capture using liquid cooling. This method drastically reduces the air cooling load to less than 1% of the total, which allows for fanless server designs that are simpler and more efficient. CoolIT, a leading provider of liquid cooling solutions for artificial intelligence and high-performance computing, has developed modular coldplate blocks that are used in multiple generations of fanless servers. These blocks are designed to handle the rising heat generated by modern processors and other components. Modern processors generate more heat than ever before, and this heat doesn't stay confined to the processor itself. It spreads to other parts of the server, including memory, networking hardware, storage devices, and power supplies. These components come in various shapes and sizes, each with different cooling needs. Unlike processors, which are relatively uniform in shape, these peripheral components can be much more challenging to cool effectively. CoolIT engineers use specialized tools such as conductive plates, vapor chambers, heat pipes, and thermal transfer plates to move heat efficiently toward the liquid cooling system. CoolIT’s cooling systems integrate all these components into a single, streamlined loop that distributes coolant evenly and is easy to install. The reliability of connections, the routing of coolant, and the time needed to assemble the cooling system during rack integration are all crucial factors in determining whether a design is practical for mass production. As server power densities continue to rise — with some racks approaching 1 megawatt — CoolIT predicts that full heat capture using liquid cooling will become the standard design for high-end server systems by 2028. While achieving 100% heat capture is practically impossible, near-total capture is becoming the norm as server density increases. CoolIT is already preparing for the next generation of ultra-dense server racks, ensuring that liquid cooling remains the key to keeping AI and high-performance computing systems running efficiently.