Upgrading my Inspiron 560

Hey everyone, this is my first actual post on here but i would like some suggestions/ help on upgrading my computer..
i also have an inspiron 560. I just upgraded my power supply to a 500 watt and i wanted to upgrade my graphics card to a EVGA GeForce GTX 650 but it won't fit!! It fits in the mb slot but there is not enough room in the case..also when i try to push the card all the way into the slot it is stopped by something in the back, i think it's called a capacitor? idk what it is but it doesn't go down into the slot on the opposite side of the part that holds the card into place. Anyways i'm pretty frustrated and i just want to know what are some sure fit cards that WILL fit for sure into my computer. My budget is about $110.. Also i have not don upgrading te anyo my my comp at all except upgrading the power supply to a 500 watt.
This is one card that i read about that fit into a 560 but not entirely sure..http://www.newegg.com/Product/Product.aspx?Item=N82E168...
That's all thanks