Power Supply:XFX 650W 80+ Bronze Certified ATX Power Supply ($64.99 @ NCIX US) Total: $64.99 (Prices include shipping, taxes, and discounts when available.) (Generated by PCPartPicker 2014-03-23 08:40 EDT-0400)
That was what was stated in the Newegg spec.'s. I thought that I had looked at the 290X version, but that is what it said. But that's also why I didn't didn't recommend an 850 watt (I usually add a 100 watt to the GPU required wattage). http://www.newegg.com/Product/Product.aspx?Item=N82E16814202044
I checked on the Sapphire website for the toxic R9-280X, and it also recommends a 750 watt PSU.
http://www.sapphiretech.com/presentation/product/?cid=1&gid=3&sgid=1227&pid=2072&psn=&lid=1&leg=0#
Power Supply:XFX 650W 80+ Bronze Certified ATX Power Supply ($64.99 @ NCIX US) Total: $64.99 (Prices include shipping, taxes, and discounts when available.) (Generated by PCPartPicker 2014-03-23 08:40 EDT-0400)