Help upgrading HP p6720f
I've got the factory model HP Pavillion p6720f Desktop and I am looking to upgrade it specifically so I can play newer games like Guild Wars 2 on medium-high settings. I know I need to upgrade my power supply (since it's only 250W output) but what graphics card would be best for achieving my goal? I've looked at so many reference sites comparing cards and prices, but it is all too foreign to me. Also, what else would I even need to be able to support the graphics card recommended?