Efficiency

Using the efficiency results from the previous page, we plotted a chart that shows the efficiency of the Tesla R2 1000 W at low loads and at loads equal to 20-110% of the PSU's maximum-rated load.



Efficiency at low loads is good enough as it is comparable to some of the Platinum competition. However, it is far away from the also Gold-certified Cooler Master V1000 that uses a newer platform. With normal loads, efficiency is at good levels, easily clearing out the 80 Plus Gold requirements.

Efficiency at Low Loads

We measured the efficiency of the Tesla R2 1000 W at loads much lower than 20% of its maximum rated load (the lowest load that the 80 Plus Standard measures) in the next tests. 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 good enough for the category of the unit, although definitely not amongst the best we have ever measured. Nevertheless, even the 40 W load is outside of the 60-70% zone, and two out of the four tests we conducted had efficiency easily surpass the 80% mark.

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: one at 100, 250, and 1000 mA each, and one with the full load that the 5VSB rail can handle.


At 5VSB, efficiency isn't impressive, but it easily passes the corresponding threshold on all tests.

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).


Vampire power is very low. It is close to one third of the ErP Lot 6 2013 limit, which is very good news!

Delta Temperature

In the following chart illustrates the cooling fan's delta difference between input and output temperature. The following results were obtained at an ambient of 41- 47°C. Unfortunately, like in the Newton R3 1000 W case which utilizes the same platform, the fan controller circuit didn't allow us to take any fan-speed readings, so we don't have any information for you on that matter.



This unit doesn't feature a semi-fanless mode, which has the slope in the above graph ramp up smoothly.