I have recently made some upgrades to my pc , I've bought graphics card gigabyte gtx 750 ti 2gb ddr5 and having core i7 with 4 gb rams and a motherboard B85-HD3 and when I bought the graphics card the guy told me I need atleast 650 watts to make it run smoothly and good I was just wondering is 650 watts enough for such pc? and is this power supply 650 watts http://i.imgur.com/BSNLMWD.jpg ?