Question about PSU?

Rybo

Honorable
Nov 4, 2013
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I currently have a CX500 thats almost 2 years old, now I had just made a thread and it was said that I would be able to run the R9 280 fine on my power supply, I'm a little weary on that. I definitely plan to purchase a new PSU but would I be able to use the 280 safely for a week or two on my aging cx500?