A Closer Look
The Corsair VX450W power supply supports the latest ATX12V v2.2 standard and is rated for a combined, continuous output power of up to 450 watts at 50°C operating temperature. That’s important as some less reputable manufactures limit their power supply’s advertised capacity by specifying a lower operating temperature (25°C) in the fine print. The PSU includes universal AC line input (automatically adjusts the AC line voltage) and active PFC, which makes the unit more environmentally friendly. The VX4500W utilizes double-forward switching circuitry that provides up to 85% efficiency over a wide load range.
The VX450W PSU provides a dedicated, single +12V output. This is a trend we are seeing in newer power supplies. Some manufacturers are no longer creating multiple +12V outputs by implementing current limiting circuits into their design to conform to the 240 VA maximum guidelines – no single output should exceed 240 VA (12V x 20A = 240 VA). Having multiple current limited +12V outputs can lead to power distribution problems, particularly with some power-hungry video cards. Delivering a single +12V output is a better approach IMHO.
Specifications (courtesy of Corsair Memory)
The Corsair VX450W power supply enclosure is painted matte black with a lime-green logo and is only 140mm (5.5”) deep. It uses a single 120mm exhaust fan on the bottom for cooling. The fan speed is automatically controlled by the internal component temperature (speeds up as the combined load and temperature increases). The dual ball bearing Adda fan (AD1212MB-A71GL) is rated for up to 80.5 CFM at 2,050 rpm and 38.0 dBA at 12V.
The open honeycomb grill on the back allows the exhaust air to exit the power supply with minimal resistance.