Noise levels
With its integrated power supply and three fans (two 80 mm for the drives and a 40 mm for the power supply), we expected the DS508’s noise levels to be a delicate subject. However, it is with pleasure that we can confirm that sound is equivalent to that of the CS407 first at rest and then after one hour of functioning with Iometer and in a well aerated place. This is therefore a relatively good result even if we cannot call the CS407 “silent”.
The rotation speeds of the two 80 mm fans were on average 1600 Rpm but slightly varied depending on the temperature. Obviously, sound then depends on the number of drives (we tested with 4 in order to have comparable values), their capacity and potential of heating up, as well as the conditions in which you use the DS508 (for example, it’s not recommended you place it in a cabinet).
Temperature
Even after an hour of intensive use, our thermometers showed a very reasonable temperature on the surface of drives: a maximum of 31.7°. Note that the values displayed on the SMART probes were roughly 2 degrees higher.
On the same systems, the differences in temperatures between the various drives are simply explained by the placement of the NAS’ components. On the DS508, the drive on the left is hotter because it is adjacent to the motherboard, while the one on the right had an open space on one side in our test. Its temperature was therefore less.
In the same way, when drives are placed horizontally, temperature readings on the highest drive are always inferior to those below because the probe is placed on top of the drive. In short, the highest and more representative measurements are obviously taken from drives 2 and 3.
Power consumption
We measured NAS consumption at the power outlet with the help of an ammeter at rest and in drive access with four drives.
Power consumption increases 10 Watts between the CS407 and DS508. This still remains reasonable and lower than the N5200BR Pro’s.
