Nexus NX3500 120mm PSU

Power
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Dec 17, 2003 by Mike Chin

Product
Nexus NX3500 "Real Silent PSU" Special Edition
Manufacturer
Nexustek
Sample Supplier
EndPCNoise
Market Price
US$80

Since their entry into the marketplace at the beginning of this year, 120mm fan PSUs have proliferated. They're still not as common as the standard 80mm fan PSU, but they no longer have the power to turn geek heads in the same way as before. Nexustek or Nexus, as the Dutch brand is better known, has come up with some special PSUs in the past.

What have Nexus done this time with a 120mm fan 350W power supply? Our sponsor EndPCNoise sent us a sample of the Nexus NX3500 "Real Silent PSU" 350W Special Edition so we could find out.

Well, first of all, they've given it a dramatic look. Gone is the ordinary grey paint and black plastic fan. Instead, we have nice coat of flat or nearly-flat black paint and a bright orange fan you just can't miss.

Note that the fan grill is not recessed into the surface. The grill and the mounting screws protrude up from that panel a couple of millimeters. In very tight spaces or with a vary large CPU heatsink, this could pose a bit of a nuisance. The exhaust grill has a nice and open hexagonal pattern of holes. (And before anyone asks, I will NOT compare the grill side by side with the Seasonic Super Tornado! Suffice it to say that, surely, airflow impedance should not be an issue in either of these PSUs.)

The retail box follows the color / design scheme of their other PSU models. It is attractive, and descriptive in several languages. A power cord and 4 mounting screws are provided.

ELECTRICAL SPECIFICATIONS

AC Input
120/240 VAC, 50-60 Hz
DC Output
+3.3V
+5V
+12V
-12V
-5V
+5VSB
Load Regulation
-/+5%
-/+5%
-/+5%
-/+10%
-/+10%
-/+5%
Line Regulation
-/+1%
-/+1%
-/+1%
-/+2%
-/+2%
-/+1%
Min Load (A)
0.3
0.1
0
0
0
0
Normal Load (A)
14
12.7
4.5
0.4
0.15
1.0
Max Load* (A)
21.2 / 28
25.5 / 30
16
0.8
0.3
2.0
Max Power
220W
192W
9.6W
1.5W
10W
Max Power**
330W

*+3.3V & +5V total output not exceed 220Watt. When +3.3V load is 28A, the +5V maximum load is 25.5A. When +3.3V load is 21.2A the +5V maximum load is 30A.
**+3.3V & +5V & +12V total output not exceed 330Watt.

So the model designation notwithstanding, 330W is the real simultaneous output capacity of the unit. This is no surprise; it is the norm in the PSU power rating game. The 12V line current rating is a touch on the low side for Intel ATX12V-V1.3 standards, but the unit does not claim adherence to the V1.3 guide and is as good or better than the vast majority of PSUs of the same power rating. This unit is equipped with Passive PFC, a requirement in the EU.



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