The 7850 Black Edition has a dual fan setup and fourcopper heat pipes. With the 7850 Black Edition using two PCI-Express 6-Pin power connectors your minimum wattage and
amperage should be 500 Watts with 30 amps on the 12V rail. Power consumption for this card is very low at 260 for full load you could easily run crossfire with a 550 watt psu. The XFX 7850 is already factory overclocked from a reference clock of 860 MHz to 975 MHz.The XFX 7850 Black Edition brings solid performance with the reliability
of an XFX product. When you're considering a new mid range gaming
graphics card, put the XFX 7850 Black Edition near the top of your list.