PC Water Cooling Blocks and Pump
The water cooling blocks are critical for rapidly transferring heat from the chips (CPU and GPU) to the water. They also must have a low resistance to flow, so that the warming water is rapidly replaced by cooler water (the rate of heat transfer is dependent on the transfer properties of the block, the rate of water flow and the temperature difference between the water and the heat block).
They mount directly on the GPU or CPU and have hose attachment ports that allow the water to circulate through them. Some graphics cards require cooling of the RAM modules as well as the GPU.
We prefer the Swiftech products for multiple reasons:
- Copper transfer blocks are better than aluminum ones (higher heat transfer properties, 401 vs 205)
- High flow rates (low resistance). After the radiator, the water blocks add the most resistance to the loop.
- Multiple configuration options. They can meet the needs of different graphics cards and flow designs.
- Quiet, high flow pumps
In our water cooling loop, we only used one powerful graphics card, and the GPU water block has only one outlet port, so the GPU was the first block in the loop. Since we used a radiator with 2 inlet ports, and the Swiftech Apogee HD CPU water block has multiple ports, we used two tubes from the CPU to the radiator to decrease resistance. If two graphics cards were used, the CPU would be first, with a line going to each GPU. Each GPU would have a tube to the radiator. This parallel flow has less resistance than putting them in series (on after another) and results in better flow rates.