What pci-express cable do I need for my r9 280? And is my power supply able to support it?

scshtx

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Jul 1, 2017
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Had a r9 280 sitting around for awhile, while using a 750 ti for the past two years. Decided to put in the r9 280 (don't ask me why I wasn't already using it), but I totally forgot that the r9 280 needed a cable to link to the power supply. Anyone mind pointing me straight in the direction of what I need?

http://imgur.com/a/VVPbA

Also, will my build even be able to support the r9 280 with a 500W power supply? The g3258 is OC @ 4.2ghz; not sure how much power that adds. Pcpartpicker says I'm at 327W but that seems pretty low.

https://pcpartpicker.com/list/YdxHgL