The number of fans inside a PC case depends on a variety of factors, including the size of the case, the components being used, and the desired noise levels. However, a general rule of thumb is to have at least one or two intake fans and one exhaust fan. The intake fans bring cool air into the case, while the exhaust fan helps to remove hot air.
When it comes to fan placement, the general consensus among PC enthusiasts is that front intake fans should be facing inward and blowing towards the components, while the rear exhaust fan should be facing outward to remove hot air. This helps to create a positive air pressure inside the case, which can help to prevent dust buildup and improve cooling efficiency.
Additionally, having a top exhaust fan can also help to remove hot air, especially if your PC components are generating a lot of heat. This can be especially helpful if you have a GPU with a high TDP (thermal design power) that is generating a lot of heat.
It’s important to remember that the placement of fans will vary depending on the specific components in your system and the layout of your case. To optimize cooling, it’s recommended to consult the manual for your specific components, as well as research best practices for fan placement within your case.
In conclusion, the best number of fans for a PC case depends on several factors, but a good starting point is one or two intake fans and one exhaust fan. Proper placement of these fans can help to improve cooling efficiency and reduce dust buildup. As always, it’s important to research best practices for your specific components and case layout for optimal results.