Not sure if you're trolling or not, but a liquid cooler isn't even exspensive, it's like $40-$100 for a good CPU liquid cooler. I got a Corsair H60i high performance liquid cooler for like $60 CAD and it keeps my CPU around 2 degrees celsius on idle and 20-40 under load. With air cooling, it would be running at about 40-90 degrees celsius, which is extremely unhealthy for the computer and would make my room very hot.