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The minimum recommended power supply is 500w and two six-pin PSU connections to connect to the card. The two six-pin connection equal a power draw of 75w each, and the PCIe connection is an additional 75w totaling in a 225w overall requirement. The card was running at 98 Degrees Fahrenheit idle and 120F under full load, which is not bad as it was running pretty quiet the entire time it was under operation, in fact you could barely hear the fan at all. I felt that the card ran very quiet and does not need a heavy duty PSU to function properly, in fat a 450w or better should actually suffice in a pinch.