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Nexus NX-4000 400 Watt Power Supply
Page 1 - Introduction & Specs
Author: Dan Podhola (WebMasterP)
Date: December 21, 2003
Category: Hardware
Options: Printable Version 12 pt Times New Roman 10 pt Times New Roman 12 pt Tahoma 10 pt Tahoma


Nexus NX-4000 400 Watt Power Supply


The power supply unit (PSU) is often one of the most overlooked components when building a computer. Often times, consumer cases come with a PSU and, understandably, people do not want to shell out more money for an item they already have. However, of all the hardware failures I have had while trouble shooting my computer and other people's computer problems, the power supply has been the culprit more often than not. Another crucial reason not to overlook your PSU is that it can be the origin of a noise problem. With the NX-4000, Nexus is attempting to provide a powerful, yet, quiet CPU that will allow a computer to run stable. Does Nexus meet that goal? Well, keep reading to find out.

The NX-4000 was provided by EV-Shop.at. I have provided a partial list of specifications below. If want that whole list of specifications, I strongly suggest visiting Nexus' NX-4000 web page.

Nexus NX-4000
Sound Level 21.7 dBA (idle mode)
Temperature Range Operating: 0°C-50°C
Storage: -20°C to +80°C
Temperature Coefficient 0.01% / °C
Humidity 5-95% RH
Efficiency 65% minimum 70% typical, at full load
Power factor correction > 0.96 at full load
Power good signal turn-on delay 100ms to 500ms
Overload protection 150% max.
Inrush current 80A cold, 120A warm @ 132VAC
Over voltage protection +5V: 6.82V (max.)
+3.3V: 4.5V (max.)

Something to note that is not in the specifications is that the NX-4000 is an auto switching PSU. An auto switching PSU means that the voltage coming from your walls socket will be compatible no matter what part of the world you are in at the time. Quite frankly I think the usefulness of an auto switching power supply can be overlooked. When I think of power supplies that require manual voltage switching, I think of the high school I used to repair computers at a few years ago. One of the most common things destroyed was a power supply; the destruction was usually due to some kid flipping the voltage switch to a higher voltage while the machine was working. Auto switching power supplies avoid this pitfall due to the lack of a manual voltage switch. Anyway, before I get too far off on a tangent, let us return to the the review.

Box Shot #1
Box Shot #1
... and #2
... and #2

As far as packaging is concerned, the NX-4000 comes in a box slightly larger than the power supply that was equipped with a small plastic handle. The box was so banged up when I received it that the lid would not hold shut, but the box design was still functional and decorative.

Plug Side
Plug Side
Wire Side
Wire Side

Inside the box, however, was disappointing compared to the packaging. The power supply came with nothing. The NX-4000 was inside with a cardboard divider than just seemed to help take up space. I'm not sure if something got lost during shipping or whatever else, but it did not even have the very standard power cable! Upon further investigation, I found that the unit was supposed to be equipped with a power cable and mounting screws. I will assume that these items were lost during shipping, which is not much of an assumption if you had seen the horrible shape of the outer packaging when the parcel was delivered.

All The Wires
All The Wires
Inside The Unit
Inside The Unit

The power supply construction was, for the most part, similar to your average power supply. Something I am definitely not used to seeing is three 4-pin Molex connectors on individual wires. I find this to be rather useful because I often find myself with extra Molex connectors dangling when I have not used all the connectors on a strand, which tends to cause clutter. With single connectors, you can just stuff the wires you do not use somewhere out of sight. Other than these wires, everything else is standard, including the supplemental 12V connector many new motherboards utilize (many PSU manufacturers use the presence of this cable to denote their PSU as a "P4 Ready" unit).

Inside Side View
Inside Side View
Another Side View
Another Side View

Inside the case we find some massive heatsinks. These heatsinks are obviously in place to keep the unit cool because of the quiet, low volume fan supplied with the unit. There are not any extra special items on the inside to note except the clear plastic pieces located on both sides. I have not seen this technique used before, so it was intriguing. I would like to remind all of you that taking apart your PSU is dangerous and should be done with extreme caution.

Main Page
Testing Results



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