Gigabyte Radeon RX 480 G1 GAMING review - Graphics card noise levels

Graphics card noise levels

When graphics cards produce a lot of heat, usually that heat needs to be transported away from the hot core as fast as possible. Often you'll see massive active fan solutions that can indeed get rid of the heat, yet all the fans these days make the PC a noisy son of a gun. Do remember that the test we do is extremely subjective. We bought a certified dBA meter and will start measuring how many dBA originate from the PC. Why is this subjective you ask? Well, there is always noise in the background, from the streets, from the HD, PSU fan etc etc, so this is by a mile or two an imprecise measurement. You could only achieve objective measurement in a sound test chamber.

The human hearing system has different sensitivities at different frequencies. This means that the perception of noise is not at all equal at every frequency. Noise with significant measured levels (in dB) at high or low frequencies will not be as annoying as it would be when its energy is concentrated in the middle frequencies. In other words, the measured noise levels in dB will not reflect the actual human perception of the loudness of the noise. That's why we measure the dBA level. A specific circuit is added to the sound level meter to correct its reading in regard to this concept. This reading is the noise level in dBA. The letter A is added to indicate the correction that was made in the measurement. Frequencies below 1kHz and above 6kHz are attenuated, whereas frequencies between 1kHz and 6kHz are amplified by the A weighting.

There's a lot of difference in measurements amongst websites. Some even place the dBA meter 10cm away from the card or directly at the cooler. To us that does not make any sense. Considering that's not where your ear is located, we do it our way. For each dBA test we close the PC/chassis and move the dBA gun 75 cm away from the PC. Roughly the same proximity you'll have from a PC in a real-world situation. 

The graphics card in a fully stressed status (in-game) sticks at roughly 38 dBA. This is a very quiet PC noise level, you will not be able to hear the GPU if you are gaming. This is excellent, we did not hear any coil noises either.

We do need to make a side-note, overclocked/tweaked with extra GPU voltage the fan did kick in harder under heavy stress and will then sit at 42 dBA. But again, that is in overclocked conditions, not the defaults.