As written in the title, I have just bought a cooler for my laptop. It's a Cooler Master Notepal U3, it has three fans which I can place whereever I want. But here is the problem, where should I place the fans to get the best possible result? I have a ASUS N56DY.
If your laptop support manual or just from observation/checking with your hand, can you find out which slots (probably all of them?) on the bottom of your laptop are the intakes? It's hard to tell the size of the fan compared to the size of the intake, but you'll want to maximize fan blade area exposure to the slotted intake areas. If you can, put more than one in that area. The center of the fan is obviously a large dead zone for air movement, so if you can fit 2 fans side to side under the intakes of the laptop, that would be best.