Im looking into getting a new GPU for my system, at the moment i have a GTX 260 (old i know) It uses 2, 6 pin Pcie Connectors, i at the moment have a 550 watt Psu. But the cards i want to get are the;
Msi R9 290x Gaming (http://www.newegg.com/Product/Product.aspx?Item=N82E16814127773)
Msi R9 290x Lightning (http://www.newegg.com/Product/Product.aspx?Item=N82E16814127787)
Msi Gtx 970 (http://www.newegg.com/Product/Product.aspx?Item=N82E16814127832)
Saphire TRI-X OC R9 290x (http://www.newegg.com/Product/Product.aspx?Item=N82E16814202079)
My only problem is that in the specifications it says the recomended psu is a 750+ watt unit. What im wondering is will i need to upgrade my psu to use these cards? I also have 2 Free 8 Pic Pcie connectors as well. And if you recommend other Graphics cards let me know, my Price range is about $350.