Efficiency, Differential Temperature and Noise
Efficiency
Efficiency is defined by the power output divided by the power input and is usually expressed as a percentage. If a PSU were a 100% efficient (which none are) 500 watts of AC power going in would result in 500 watts of DC power coming out (with no waste heat to dissipate). In the real world there are always inefficiencies and power is lost in the form of heat during the conversion process. Newer revisions to the ATX12V Power Supply Design Guide V 2.2 have continued to increase the efficiency recommendations for PC switching mode power supplies and now lists both required and recommended minimum efficiencies.
We measured the AC power input to the Nightjar NJ520 PSU with an Extech power analyzer while the total DC load was found by adding all the individual +3.3V, +5V, +12V, -12V and +5VSB loads together.
The overall efficiency of the Nightjar NJ520 power supply is also excellent and meets the criteria for 80Plus Platinum certification, even while operating on 115 VAC and at elevated temperatures.
80 Plus Program
Note: Tests conducted at room temperature (25°C)
Differential Temperature and Noise Levels
To measure the differential temperature of the NJ520 during testing we placed one thermocouple over the top of the power supply in a modified case with the top panel removed (T out). A second thermocouple measured the ambient air temperature at the bottom of the PC enclosure (T in). The ambient room air temperature was ~23ºC (74ºF) during testing.
T out = temperature of air exhausting from power supply
T in = temperature of air entering power supply
Delta T = T out – T in
Because the NJ520 is fanless and incorporates no moving parts the PSU is essentially silent during normal operation.
this is Great for a mini-ITX
this is Great for a mini-ITX build!
I probably would have put the
I probably would have put the thermal sensor near the area where the PSU develops its 12-volt power for the PC while having a GPU and other things attached to it running at max (i.e. gaming).
Wow, this is great. Im
Wow, this is great. Im planning a game build to do with my daughter this july, This might be our PSU. Id rather get the upcoming SFX 600 from silverstone, but try as I might, I cannot find any info on the release of it. Even though they have been teasing it for quite some time. Thanks for showing off this unit, RoboTech. And thanks to Silverstone, now send one to OC3D, so I can see how it handles a 780.
In my opinion, this is
In my opinion, this is Seasonic power supply with Silverstone name on it. This is Seasonic Platinum-520 FANLESS without painting. Even the sticker is the same shape as the one on Seasonic power supply’s. Warranty sticker is no different from that on the Seasonic branded. Seasonic – 139.99, Silverstone – 149.99. Big disappointment Silverstone, big disappointment 🙁
Hey Lee,
This is a great idea
Hey Lee,
This is a great idea which a fan less power supply for silent operation, instead of fan a ribbon is used it work great. i think this is the first one to introduce fan less power supply to pc. Now a inverters and generators are also manufactured with out much noise and emission. As well as the performance of the silverstone nightjar is good according to the performance test that you have done.
Thanks & Regards,
Venki