One of the noisiest parts of any computer is the fans. These are essential to keep the components cool but there is no reason they have to be noisy. The standard sizes that they come in are 80mm ...

Its 7 fan blades optimized for air flow not only reduce noise causing turbulence ... classic and an elegant addition to any gaming PC. Pure Wings 3 120 mm PWM White is designed for a long service ...

Consequently, 30dB is about twice as loud as 20dB, and a computer producing 40dB of noise would be approximately four times louder than one generating 20dB. A PC emitting only 20dB of noise would ...