this is my graphics card ZOTAC ZT-60901-10M G-SYNC Support GeForce GTX 660 2GB 192-Bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card http://www.newegg.com/Product/Product.aspx?Item=N82E16814500270&fb_ref=Default , what power supply would be the best to get? i know it needs a 600watt supply but are there different 600^ watt power supplies that do and do not have a 6 pin power connector slot in them? or should i try to sell my graphics card and try to get this one http://www.newegg.com/Product/Product.aspx?Item=N82E16814487025? im looking to be able to play GTAV, Guildwars 2, heroes of the storm, diablo 3, and newer games would i get high fps on my current card like 50-60fps or only if i get the 750 ti?