In the EX-1200 ATX12V & EPS12V Power Supply by using Frequency Conversion technology, can actually emulate virtually any size power supply and therefore be at least 80% efficient, even with loads as low as 10% of the unit's maximum capability. The power supply has the lowest minimum load requirements and the best +5VSB efficiency on the market....

EPS12V Power Supply - Output Power: 550 W - Input Voltage: 240V AC - Frequency: 50 Hz - 60 Hz - Receptacles: 1 x 24-pin ATX Motherboard - 1 x 4+4pin EPS12V Motherboard - 1 x Serial ATA - 1 x 6-pin PCI-E - 1 x 8-pin PCI-E - Input Voltage Range: 100V AC to 240V AC - Output Voltage: 3.3V DC...

BFG Tech combines high performance, high efficiency, and low noise all in a MX-550 ATX12V & EPS12V Power Supply. Thermal Control Technology ensures that the unit runs as quietly as possible by varying the speed of the 120MM fan in response to load and temperature. An 80MM "helper fan" only kicks in when temperatures reach over 50C to ensure maximum performance, longer life, and low noise at lower temperatures....

GS-550 ATX12V & EPS12V Power Supply feature a typical efficiency of up to 85%, so more power is converted to DC than many other power supplies on the market. BFG Thermal Control Technology ensures that the unit runs as quietly as possible by varying the speed of the fan in response to load and temperature....