With fish tank cases still extremely popular among new builders, it's quite common to cram the case with fans and run them at 100% speed without caring about fan placement.

It's myths like these that end up hurting the performance of your gaming PC

Let's see how to avoid leaving cooling performance on the table, and get a more silent PC without hurting your temps

1) The more fans the better

It sounds wise on the surface — the more fans you install, the more air you can get inside your PC. However, what matters more than the number of fans is the fan placement.

Simply filling up all the fan slots inside the PC will not bring down your system temps by itself. You also need to keep positive pressure in mind and avoid turbulent air from disrupting optimal cooling inside the case.

A case with positive pressure means you have more air coming into the system than going out of the system. This is usually achieved by installing more intake fans than exhaust fans, with most users relying on 2 to 3 fans for intake, and 1 to 2 for exhaust.

Avoiding turbulent air means you're not installing fans in a way that results in conflicting airflow — the intake and exhaust fans should work in synergy to create a seamless airflow path.

Lastly, the type of case fans matter much more than the number of fans

2) Fan noise is inevitable

Many users believe that their PCs sounding like industrial fans under heavy load is normal. For one, that's what the fans are there for — to run as fast as possible and keep the PC from overheating.

The thing is, however, that your PC doesn't have to sound noisy, barring a few extreme workloads. Even in heavy gaming, you can strike a good balance between performance and noise levels using optimized fan curves

Fans on newly assembled PCs often run at full speed by default. Inexperienced users might consider the behavior normal, and continue using the PC in the same state.

3) Fans perform best at full-blast

Some users might configure their fan curves for silent operation in idle conditions but prefer to run them at full blast when gaming. The logic at play here is that the faster a fan runs, the more air it pulls in, and the better it cools the components.

The catch, however, is that running all your fans too fast ends up hurting the cooling performance.

This is because cool air needs enough time inside the case before being ejected out. The hottest areas inside your PC, such as the CPU cooler heatsink and the GPU shroud, need sufficient contact with the incoming air for optimal heat transfer.

If both your intake and exhaust fans always run at near-100% speed, it creates airflow that is simply passing through the PC without doing its job.

4) Fan configuration doesn't matter if you have enough airflow

This is yet another myth that could be keeping your CPU temperature unnecessarily high. Despite enough air coming into the case, you could end up with sub-par cooling if the case fans aren't positioned right. Optimal fan configuration is crucial to creating unobstructed airflow inside the case.

Your intake and exhaust fans should be installed in such a way that they work together, not against each other

5) Default fan curves are good enough

The default fan curves in the BIOS/UEFI or even in motherboard software aren't always the best.

You can find silent, standard, and performance modes in these programs, but they simply can't replicate the optimum curves for every PC out there

This is why tools like Fan Control are so powerful — you can not only set individual fan curves for every fan but also set them to function together based on various parameters.

Source - XDA 

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