Re: HP Pavilion Elite m9047c Desktop
Firstly, I find the way you listed the specs a little confusing. Do you know if you are running a dedicated graphics card right now, or is it onboard graphics? (an easy way to tell is to look at the rear of your desktop. If your monitor's port is with all of the other outputs (keyboard, usb, etc), then it's onboard. If you have a monitor down below (in one of those "slots") then it's dedicated.
If it's onboard and you are having issues, that's not typical of onboard graphics...especially for streaming vids and movies (very low graphics requirements). If it's dedicated, there *could* be a problem with the card, but there are other things to check first.
What exactly is wrong? You didn't specify your problem. Why don't you let us help you figure out if it's really the GPU that's the problem before you throw money down the drain.