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We take the issue of noise very seriously at KitGuru and this is why we have built a special home brew system as a reference point when we test noise levels of various components.
Why do this? Well this means we can eliminate secondary noise pollution in the test room and concentrate on components we are testing. It also brings us slightly closer to industry standards, such as DIN 45635.
As this can be a little confusing for people, here are various dBa ratings in with real world situations to help describe the various levels.
KitGuru noise guide
10dBA – Normal Breathing/Rustling Leaves
20-25dBA – Whisper
30dBA – High Quality Computer fan
40dBA – A Bubbling Brook, or a Refridgerator
50dBA – Normal Conversation
60dBA – Laughter
70dBA – Vacuum Cleaner or Hairdryer
80dBA – City Traffic or a Garbage Disposal
90dBA – Motorcycle or Lawnmower
100dBA – MP3 player at maximum output
110dBA – Orchestra
120dBA – Front row rock concert/Jet Engine
130dBA – Threshold of Pain
140dBA – Military Jet takeoff/Gunshot (close range)
160dBA – Instant Perforation of eardrum
Noise was measured from half a meter away.
The YS Tech fan is a quiet performer and only spins up with the system is heavily loaded with file transfers. It will not be audible under the majority of real world environments.
We measured power from the socket with 2 x 2TB Samsung HD204UI drives installed.
When idle, the DS211+ is only consuming 13 watts of power which is a figure many people will be pleased to see. When under load it only rises to 29 watts, lower than the DS411j we recently tested with 2x1TB Samsung drives installed.
The single YSTECH fan is a capable choice in this particular chassis, maintaining an average temperature of 29c for both 2TB drives. Other drives may average slightly higher results but we are confident this cooling system is more than adequate.
