Nexus NX-4090 "Real Silent" PSU

Power
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Dec 11, 2004 by Mike Chin

Product
Nexus NX4090"Real Silent PSU" Special Edition
Manufacturer
Nexus Technology BV
Sample Supplier
EndPCNoise
Market Price
US$99

It's been a year since our review of the first Nexus 120mm fan PSU, the NX3500. Earlier this year, Nexus introduced a high power rated version of the same PSU, the NX4090. Nexus states:

"The NX4090 is a 400 Watt (true power) power supply based on the successful design of the NX-3500. The Nexus NX-4090 produces an amazing 16.2 dB(A) in idle mode and surely leads the market. The NX-4090 is version 2.0 compatible!"

There has been much positive discussion about the NX4090 in the SPCR PSU forum. A most enthusiastic SPCR member, Alexander Chiu, sent over his own personal sample, which he had replaced with a more powerful model. It was slightly damaged in transit, and our sponsor EndPCNoise decided to send us a new sample to test.

Visually, the NX4090 is not much different from the NX3500. The distinctive orange 120mm fan, black color casing, wide open honeycomb grill; in fact, the two are hard to tell apart.


Which is which? The top photo is of the NX4090; the bottom one is the NX3500.

One obvious change is that the fan grill is recessed and flush with the metal panel. This will ensure proper fit into any standard case without fuss. The nice and open hexagonal hole exhaust grill is unchanged. The retail box is almost identical, save the model number and dBA markings. A power cord and 4 mounting screws are provided.

ELECTRICAL SPECIFICATIONS

Aside from the obvious 50W increase in output capacity, the NX4090 is now ATX 12V version 2.0 compatible and can be used on 24-pin motherboards using a special 20-pin to 24-pin adapter cable. This adapter cable is sold separately and is not included in the package. Part of the version 2.0 specification is the provision of two independent 12V lines. The unit is equipped with Passive PFC, a requirement in the EU. Details of the output specifications are provided in the table below.

AC Input
120/240 VAC, 50-60 Hz
DC Output
+3.3V
+5V
+12V1
+12V2
-12V
+5VSB
Load Regulation
-/+5%
-/+5%
-/+5%
-/+5%
-/+10%
-/+5%
Line Regulation
-/+1%
-/+1%
-/+1%
-/+1%
-/+2%
-/+1%
Min Load (A)
0.5
1.0
1.0
1.0
0
0
Normal Load (A)
15
14
7.0
8.5
0.4
1.0
Max Load* (A)
3.0 / 30
10 / 28
4.5 / 14
5.55 / 15
0.5
2.0
Max Power
150W
168W
180W
6W
10W
Max Power**
385W
16W
Notes
*+3.3V & +5V total output not exceed 150Watt. When +3.3V is load to 30A, the +5V maximum load is 10.0A. When +3.3V is load to 3.0A, the +5V maximum load is 28A.
**+3.3V & +5V & +12V total output not exceed 385Watt.



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