coolguy12 :
Cooler master thunder 500W is my power supply
and saphhire 7850 2gb is the GPU
Be careful. If video card is "OC" version, then it requires 2 x 6PIN connectors, but the CM Thunder 500W only has 1 connector. However, Saphire includes two 4pin to 6pin adapters, so you should still be fine.