Water-cooled PC systems have a number of advantages when compared to the more common and typical air-cooled systems. For starters, PC coolant boasts a higher thermal conductivity than air. High-performance gaming and media machines can be uncomfortably loud with all the extra fans. Water-cooled systems are a lot quieter and are proven to cool the PC at a more effective rate.
Buy the water blocks that your new system will be cooling. There should be blocks for your CPU, memory, hard drive and video card. Select all the appropriate blocks for your custom system. For the best performance, purchase a water block for each of the hardware pieces. However, it is not necessary to acquire a block for all these pieces.