Hey I have no clue what I am doing and am a complete novice. I purchased this case (http://www.newegg.com/Product/Product.aspx?Item=N82E16811148047) which comes with a built in 480W PSU, but I planned to upgrade it. I purchased the Radeon R7 260x and am now looking for a solid PSU that isnt crazy expensive and can support the GPU. Was looking at this one (http://www.newegg.com/Product/Product.aspx?Item=N82E16817182298) (The 550W), but am not sure it will work with the Radeon considering it's 2x6+2 Pins (not that I honestly explicitly know what that means) and the GPU I have only has a slot for a 6 pin. I feel like it would work but want to make sure, or know if there are better PSU's out there for a relative price. Thanks! 
