Yes when you have all of the correct and relevant information that is needed then Google is great for research and that is what I used to find the specs for your notebook which clearly shows that the notebook is only shipped with either a dual or single core CPU (see Product Description)
http://h10032.www1.h...l/c02948186.pdf and that the video is provided by either the Intel HD graphics on computer models equipped with an Intel Celeron processor or the alternative Discrete graphics: AMD Radeon HD series graphics chip, you did not tell us what your video solution was but only the following intell celeron b800 1.5 ghz, 2gb ram ddr3, and windows 7 pro 64bit
Use Google yourself and you will see that the AMD E450 CPU which is shipped with some Compaq Presario cq57-339wm is the FT1 BGA 413-Ball MB/CPU socket type while the MB that your notebook is shipped with and accepts your original Intel Celeron B800 CPU has an FCPGA988 socket and so will not accept an AMD chip of any description
http://superuser.com...d-amd-cpu-chips
FWIW the attachments below show the difference between a video card and a notebooks onboard video chip, note the massive size difference between the two.