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Guru3D.com » Review » AMD Radeon RX Vega 64 8GB review » Page 11

AMD Radeon RX Vega 64 8GB review - Graphics card noise levels

by Hilbert Hagedoorn on: 08/14/2017 02:00 PM [ 3] 185 comment(s)

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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.

TYPICAL SOUND LEVELS
Jet takeoff (200 feet) 120 dBA  
Construction Site 110 dBA  Intolerable
Shout (5 feet) 100 dBA  
Heavy truck (50 feet)  90 dBA  Very noisy
Urban street  80 dBA  
Automobile interior  70 dBA  Noisy
Normal conversation (3 feet)  60 dBA  
Office, classroom  50 dBA  Moderate
Living room  40 dBA  
Bedroom at night  30 dBA  Quiet
Broadcast sstudio  20 dBA  
Rustling leaves  10 dBA  Barely audible

 
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 45 dBA. This is a moderate noise level, you will be able to hear the cooling if you are gaming. However, that noise is mostly air-flow, not something that is irritating. But sure, definitely audible.




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