Will this run with my power supply?

[Danoroth]

Hey I have a desktop pc, i7 3.4 GHz, 1TB hard drive, 4Gb DDR3 ram and a 500w power supply, will it run a Sapphire HD6790 1G?

 

[2048Megabytes]

Please post the specifications of the power supply. "500 Watt power supply" is not sufficient information in order for us to give you good advice.