I need a good advice for choosing a GPU and PSU

adequate

Honorable
Apr 14, 2013
31
0
10,530
Hello, i am new to this upgrading your video cards and stuff and i mostly use my pc for gaming. I want to change my video card (AMD Radeon HD 7660D) to something better, i want to play Battlefield 3 at 1920 x 1080 resolution with at least medium settings. My budget for a GPU is $150 and $60 for a new PSU that will meet the GPU's need in power. This is my pc i bought it last year: http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03353576&prodSeriesId=5187022
The specs or here http://h10010.www1.hp.com/wwpc/ca/en/ho/WF06b/12454-12454-3329740-64546-64546-5187022-5231644.html?dnr=1
CPU Type:
AMD A10-5700 APU with Radeon(tm) HD Graphics
CPU Speed:
3.42 GHz
System Memory:
10.12 GB

i also dont know how to install or change my old GPU and PSU so please if u know any good link for tutorial or something post it here and thank you very much.