PCU For Asus CM6850? (Stock so far)

[ProjectSiK]

So, I asked people on GameFAQs how my PC would be in terms of handling Battlefield 3 and my video card (GeoForce GT 530) is apparently garbage. After asking for some video card recommendations (I'm entirely new to PC gaming just so you know) I was told I would need to upgrade my PSU and one user told me I should come here for some recommendations. So, from what information I gathered, I apparently need at least a 550W PSU (For a GTX 560 Ti). Could anyone here give me some recommendations? I'm probably going to ask someone to install it for me because I'd be too worried about messing something up due to the fact that I have absolutely no experience with that kind of stuff. Any help is appreciated and I apologize if this is in the wrong section, I'm new here :\

 

[clutchc]

So, I asked people on GameFAQs how my PC would be in terms of handling Battlefield 3 and my video card (GeoForce GT 530) is apparently garbage. After asking for some video card recommendations (I'm entirely new to PC gaming just so you know) I was told I would need to upgrade my PSU and one user told me I should come here for some recommendations. So, from what information I gathered, I apparently need at least a 550W PSU (For a GTX 560 Ti). Could anyone here give me some recommendations? I'm probably going to ask someone to install it for me because I'd be too worried about messing something up due to the fact that I have absolutely no experience with that kind of stuff. Any help is appreciated and I apologize if this is in the wrong section, I'm new here :\

A lot depends on the video resolution you will be gaming at. 1440x900? 1680x1050? 1920x1080? The higher the resolution you go, the more powerful the graphics card needs to be to play with all the eye candy at max settings. If you are gaming on a LCD flat screen monitor, you probably want to game at its native resolution. The GTX 560Ti is a good choice. So is the HD 6850; less money and good up to 1920x1080. Under normal every-day Windows use, the cards don't need much power. However, when you stress them at gaming, they need a lot of power. That's why a powerful PSU is required.
Graphics Card Hierarchy Chart: http://www.tomshardware.com/reviews/gaming-performance-radeon-geforce,2997-7.html
Power Supply Calculator: http://www.extreme.outervision.com/psucalculatorlite.jsp