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Guru3D.com » Review » Thecus N5810 NAS review » Page 14

Thecus N5810 NAS review - Power consumption & Noise levels

by Hilbert Hagedoorn on: 12/17/2015 10:56 AM [ 5] 0 comment(s)

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Noise Levels

When computer hardware produces 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 HDD, PSU fan, 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 1 kHz and above 6 kHz are attenuated, whereas frequencies between 1 kHz and 6 kHz are amplified by the A weighting.

Examples of Sounds 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 studio  20 dBA  
Rustling leaves  10 dBA  Barely audible 


The unit as tested is not on the noisy side, in fact it is very silent in its default configuration. We measure with a certified DBA meter at 75cm distance of the NAS unit. Our background noise level is roughly 33 DBa. Your HDD will make the actual noise you hear. 

Power consumption.
We placed the good old wattage meter in-between the wall power socket and the device to see how much power it actually eats away. I mean, this is a semi-based controller slash server really.

Results above are measured based on one 8TB Seagate HDD (not the SSD). On average a modern HDD eats roughly 5~7 Watt when in use. So even if you used two 8 TB HDDs and use them ALL the time, you'd be looking at maybe 20~25 Watts power consumption in total. When the device is in sleep mode (HDD spun down) your average power consumption will be roughly 16~17 Watt. For this kind of performance and processor power, the results are good. 
 




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