This particular product is available in one model, NX-9003 SFB (Part No.: 9PA3503328). This power supply has a continuous wattage of 350 which is marginal power for today's computer systems. Now how is this wattage determined? Well to understand that you need to know what rails are. The power specifications are listed below:

Rails are basically well regulated transformers which convert domestic current into the voltages that your computer system can use. There are essentially two different rails: the 3.3/5v rail and the 12v rail. In this particular case there are a couple of maximum peak outputs of the 3.3/5v and 12v rails:

(1) +3.3V & +5V total output does not exceed 130Watt. When +3.3V is load to 22A, the +5V maximum load is 11.4A. When +3.3V is load to 7.5A, the +5V maximum load is 21A.
(2) +3.3V & +5V & +12V1DC & +12V2DC total output does not exceed 335Watt.



The 3.3/5v rail is responsible for the motherboard, memory, PCI cards, AGP card and so on. The 12v rail is responsible for the HDD's, DVD, CD-ROM, fans, etc.

Also, some might be interested to know the peak amps on each rail. The +3.3V is 22A, and the +5V is 21A. Unlike most power supplies with only one +12V rail, this product has two. The +12V1 is 10A and the +12V2 is 15A.

This power supply meets the ATX 12V v2.01 specification. This basically means that a power supply must be able to sustain full load in 50 C (122 F) ambient conditions. Although, power output on all models will decrease ~1 C starting at an ambient temperature of 40 C. Having the ATX 12V v2.01 specification is important because some power supplies tend to overheat and shut down the system under max load. Higher end power supplys float in the ~85% range. Note that the more efficient a power supply is the less heat is generated and therefore won't require excessive cooling.

This power supply also has Active Power Factor Correction (PFC). Active PFC is preferred over Passive PFC because it provides more efficient power frequency. This reduces total harmonics, corrects input voltage, and it allows for a full input voltage range. The disadvantage is that it increases the cost of the power supply. 

Additionally, this product is 100% Hi-pot, Chroma, ATE (Automatic Test Equipment) & Burn-in function tested. What the heck does all that mean? Production Hi-pot testing ensures insulation integrity. Chroma is a world recognized leader in power supply testing equipment which includes automated power supply test systems, electronic loads, programmable AC power supplies and related equipment to support the power conversion industry. Finally, Burn-in is really a stress test and means it was tested at full load and still meets specs.

A power supply also needs to be fail-safe. This unit has Over Voltage Protection (OVP), Short Circuit Protection (SCP), Over Temperature Protection (OTP), and line input fuse protection.

Also, it's certified with TV, CSA, UL, NEMKO, FCC, C-tick, BSMI, CE.