I was wanting to upgrade my gtx 760 to an r9 290x, namely the sapphire. I know that this is quite the squeeze in power limits, and I will probably upgrade the PSU later on.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814202145&cm_re=290x-_-14-202-145-_-Product
PSU: OCZ 600w
http://www.newegg.com/Product/Product.aspx?Item=N82E16817341017
CPU: FX 6350
2 HDD, 1 SSD
The wattage calculator gave me a minimum of 522w
http://www.newegg.com/Product/Product.aspx?Item=N82E16814202145&cm_re=290x-_-14-202-145-_-Product
PSU: OCZ 600w
http://www.newegg.com/Product/Product.aspx?Item=N82E16817341017
CPU: FX 6350
2 HDD, 1 SSD
The wattage calculator gave me a minimum of 522w