If you are running an older motherboard and are unable to adjust fan speeds through the BIOS, or would prefer to make adjustments within Windows, SpeedFan is a free software solution that also allows you to monitor temperatures and voltages. If you have experience overclocking, the methodology is the same. By underclocking and undervolting your CPU and your GPU, you can pull back load temperatures and run your fans as slow as possible. If you are unwilling to increase noise levels to keep your components safe, then you will need to consider sacrificing some performance. If your CPU starts throttling, you will need to go back and make adjustments, sacrificing some aural comfort. You also need to test your average workload thoroughly to ensure that your components aren’t overheating to maintain silence. There is some trial and error in this since it can be hard to judge how loud a fan is going to be at a specific RPM and not all manufacturers list decibel levels for their products. When you are building a silent system, you need to decide how much noise you are willing to tolerate and then set the maximum speed of your fans accordingly.
If you at all concerned about noise, this balance can be harder to achieve. You need to find a balance between all the fans in your system to ensure that they are working together and not fighting each other.
CPU cooler performance doesn’t matter if hot air is being trapped inside your case. If you have configured your case fans in a way that your GPU or CPU coolers are feeding them hot air, you will need to make sure their speeds can dissipate heat at, or higher than, the rate that your components are dumping it out. You want to make sure your components stay well below their throttling points to maximize performance. When adjusting your fan curves, it’s important to give yourself a bit more headroom than you think you’ll need.
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