Nexus RX1-K 1000W Review

As technology develops, PC hardware components need more and more cooling. Big sized VGA’s with big coolers, large CPU fans and case fans tend to make your computer noisier. However, there are special products that are designed to keep the noise levels down. The computer’s Power Supply Unit is also a source of noise, but also plays an important part in the system’s stability, as it has to supply power efficiently in the whole system. Today we will present you the review of the Nexus RX1-K PSU that has a 1000W output. 


2011 01 24 111756 - Nexus RX1-K 1000W Review


Nexus was founded in 2000 and its headquarters are located in Netherlands. They specialize in low-noise products, such as PSU’s, cases, case fans, coolers and several other accessories.

Let’s take a look at the Nexus RX1-K specs:

   * 1000 Watt true power PSU
   * 80% efficiency; complies with 80PLUS specifications
   * Inaudible performance
   * Modular cables sleeved with X-mesh
   * Active PFC
   * Real Silent 13.5cm fan
   * Excellent airflow, honey-comb grill
   * Full range automatic; no voltage selection has to be set
   * Multiple safety features such as: overvoltage and short-circuit protection
   * Ball bearing fan
   * Complies to WEEE & RoHS
   * Version ATX 2.2
   * +3.3V @ 12A; +5.5 @ 30A and 170W combined
   * +12V @ 75A and 900W available
   * -12V @ 0.5A and 6W
   * +5VSB @ 3A and 15W
   * Size:150 x 86 x 158mm (5.9 x 3.4 x 6.2in)


A Closer Look


The Nexus RX1-K comes in a black and yellow package, on which we see an actual photo of the PSU, the brand logo and the output power. At the back side of the package all the main characteristics are stated. At the side of the package there are graphs for efficiency and noise levels. 

Screenshot Studio capture 008 300x215 - Nexus RX1-K 1000W Review


Here we see a detailed explanation of the package’s included connectors, as the PSU is modular, so you can take out the cables you do not want, to keep your case neat.


Screenshot Studio capture 004 1 - Nexus RX1-K 1000W Review


Here we see a picture of the actual PSU. The body is well built and has a nice black finish.


IMG 2317 - Nexus RX1-K 1000W Review


Here we can see how the PSU fits in our case. Thanks to the modular design, you can use only the cables that you really need.


Screenshot Studio capture 006 - Nexus RX1-K 1000W Review


The connector cables supplied will cover any modern system’s needs.


Test Setup

The machine on which we tested the Nexus RX1-K PSU is:

CPU:Intel Core i7-920 (45 nm, 4 GHz, 8 MB L2 Cache)
Asus P6X58D Premium 
RAM:6GB Muskin DDR3 6-7-6-18
HDD:Seagate Barracuda 7200.11 1.5TB
Graphics:NVidia GeForce GTX480
Power Supply:
Nexus RX1-K 1000W

The tests we performed are :


  • Voltage Regulation Test
  • Efficiency Test
  • Temperature Measurement Test
  • Power Test
  • Noise Measurement Test


Voltage Regulation Test Results

We used some power-hungry components as the GTX 480 to check the voltage regulation.
We performed the test in  the following 4 situations:

Idle WindowsLoad, running Prime95 to stress CPULoad, running 3DMark 06Load, running combined tests to stress whole system

Using a multimeter, we measured the voltage output coming from the PSU’s ends.


graph 3.3v regulation - Nexus RX1-K 1000W Review



graph 5.5v regulation - Nexus RX1-K 1000W Review


graph 12v regulation - Nexus RX1-K 1000W Review



Judging from the results, the RX1-K performs really well even under full system load. As proved, there is no loss of power.


Efficiency, Temperature and Noise Tests

The efficiency rating of a power supply determines how much energy is wasted or lost when it converts the wall outlet power to the internal power components. For example, a 75% efficiency power supply that generates 300W of internal power would draw roughly 400W of power from the wall. The important thing to note about a power supply is that the efficiency rate will vary depending upon the load amount on the circuits as well as the condition of the of the circuits.


graph efficiency1 - Nexus RX1-K 1000W Review


graph efficiency 2 - Nexus RX1-K 1000W Review



As we can see from the graphs above, the efficiency of the RX1-K is very good, so not much energy is wasted while converting external power for in system use.
At the temperure test, we measured the PSU temperature at 0%, 50% and 100% system load.


graph temperatures - Nexus RX1-K 1000W Review

We notice that in all system loads the PSU temperatures are above average, it seems that the PSU produces a considerable amount of heat during its functions.
For the end, we kept the thing that Nexus is bragging about, the noise levels.


graph noise levels - Nexus RX1-K 1000W Review

We found out that the RX1-K is one of the most quiet PSU’s around. It is really silent during its function.



During our tests, we found the Nexus RX1-K to be silent, efficient and a well built PSU. In Europe it costs around 170 euros, which is a considerable amount for a PSU, but it is worth the money as it is stable and must for a high-end system. The only negative we found is the heat it produces during its operation, but it is nothing to worry about.


(+) Energy efficient
(+) Silent
(+) Nice build quality
(+) Modular


(-) Heat during operation


Thus, we give the Nexus RX1-K 1000W PSU a rating of 9.0/10 and our editor’s choice award.


Editors Choice 294x300 - Nexus RX1-K 1000W Review

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