This particular product is available in one model, SP-600W. This power supply has a continuous wattage of 600 and a peak load of 650, which is ample power for today's computer systems.

Now how is this wattage determined? Well to understand this, you need to know what rails are. 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 the approximate maximum peak output of the +3.3/+5v rail is 190 watts and the +12v is 432 watts, which is essentially how the wattage of this power supply is determined.



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.

Ok, let's get into the details and specifications!

Here are the peak amps on each rail. The +3.3V is 26A, and the +5V is 40A. Unlike most power supplies with only one +12V rail, this product has two. The +12V1 is 20A and the +12V2 is 20A. Also, the AC input specs are: 115VAC/230VAC, 10/6A 60/50Hz.

This power supply meets the Balanced Technology Extended (BTX) Interface Specification v1.0a. It's also ATX 1.3/2.03 Specification Compliant. For additional information on form factors please visit Form Factor website. The ATX 1.3/2.03 specification predates the newer 2.01/2.02 specification in a couple of ways. 1.3 It's a little less efficient (~10%) and focuses on the +5V rail for primary power. Focusing on the +5V rail though is something the latest motherboard and video card companies are not doing. Rather, they are using the +12V rail for high-current power requirements. NOTE: Most new power supplies are ATX 12V v2.1/2.2 Specification Compliant.

The European model of this power supply has Active Power Factor Correction (PFC). The North American model currently doesn't have Active PFC though. Active PFC is preferred over Passive PFC because it provides a 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. So what the heck does all that mean? Well, 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 Load Protection (OLP), and Over Temperature Protection (OTP).

Also, here are its safety approvals: UL, FCC, CE, CSA, and TUV certifications.

Ever wonder who actually makes a particular PSU? Many companies do not make the Power Supplies in-house. Rather, they are made by an original equipment manufacturer (OEM) which are probably unknown to most of us. So, how does one go about finding out who actually made it? Well, that's very simple. Just get the number which is below the UL logo. In this case it's E257731. Now visit this UL Database site and enter the number. This PSU was actually manufactured by Spire.