Efficiency

Using the efficiency results from the previous page, we plotted a chart showing the efficiency of the Newton R3 1000W at low loads and at loads equal to 20-110% of the PSU's maximum-rated load.



For a discussion of these results, see the text at the end of the previous page.

Efficiency at Low Loads

In the next tests, we measured the efficiency of the Newton R3 1000W at loads much lower than 20% of its maximum-rated load (the lowest load that the 80 Plus Standard measures). The loads that we dialed were 40, 60, 80, and 100 W (for PSUs with over 500 W of capacity). This is important for settings where the PC is in idle mode with power saving turned on.


Efficiency at low loads is high enough if we take into account the capacity of the unit. It may be Platinum certified, but its high capacity doesn't allow for higher efficiency at such low loads. It did manage to hit 77% with only 40 W of load, and you can't ask much more from a 1kW PSU. The PSU only operated in fanless mode during the first load test. The fan engaged at low speeds with a 37°C ambient during the second test.

5VSB Efficiency

The ATX spec states that the 5VSB standby supply's efficiency should be as high as possible and recommends 50% or higher efficiency with 100 mA of load, 60% or higher with 250 mA of load, and 70% or higher with 1 A or more of load.
We will take four measurements: three at 100, 250, and 1000 mA, and one with the full load that the 5VSB rail can handle.


Efficiency is good at 5VSB, but is definitely not impressive. We would like to see readings closer to 80% on the last two tests - ideally even above that mark.

Power Consumption in Idle & Standby

In the table below, you will find the power consumption and the voltage values of all rails (except -12V) when the PSU is in idle mode (powered on but without any load on its rails) and the power consumption when the PSU is in standby mode (without any load at 5VSB).


Phantom power is even lower than half of the limit that the new ErP Lot 6 2013 directive sets. This is good news for the environment since significantly less energy is wasted in standby.

Delta Temperature

In the following chart the cooling fan's delta difference between input and output temperature is illustrated. The following results were obtained at 38°C - 45°C ambient.



Unfortunately, the fan controller of this unit didn't allow us to take any fan speed readings, so we don't have any information for you on this matter.