Question 1 : what is the power of the power supply
Question 2: Do you have a spare Molex connector cable ? (you know the white connector to plug in cdrw's)
if yes on this question you could get a Molex to 6 pin, much like this https://www.amazon.com/Molex-PCI-Express-Video-Adapter-Converter/dp/B00DFZ7HDK