Help upgrading graphics card, please

[bstore2]

I've never built my own PC, though in the future I'd like to. I figure I'd start small and try upgrading the video card on a prebuilt PC I bought last year. This is the PC.

http://www.newegg.com/Product/Product.aspx?Item=N82E16883147971

Here are my questions.

1. Do I have to pick an AMD GPU since the CPU is AMD?
2. Am I limited in anyway other than power supply? (Such as CPU power, case design, etc)
3. What are some options in a range of prices I could browse?
4. Would I need any special tools?

Thanks so much!

 

[skitz9417]

u dont have go with amd if u dont want to and u dont any special tools and what ur prices range

 

[FlintIronStagg]

you will in the end be limited by your cpu.
http://www.tomshardware.com/reviews/gaming-cpu-review-overclock,3106-5.html
i wouldnt go much faster of a card without upgrading the cpu as well.

 

[bstore2]

Best answer selected by bstore2.