New fraphics card install

[joetezza]

Would like help installing a new HD 6770 in an Acer MD 5640.

 

[jsc]

Page down to where techmo installs the video card (Step 6):
Build it yourself:
http://www.tomshardware.co.uk/forum/274745-13-step-step-guide-building

 

[farrengottu]

here is a video on buiding a system but about 39 minutes in, it covers installing a video card.
http://www.youtube.com/watch?v=d_56kyib-Ls&feature=relmfu

 

[joetezza]

I have a general idea of installing a video card, but my system which is an Acer MD 5640 doesn't have an existing card, but is internal I believe. I need to know how to remove the existing graphics memory or drivers, and which ones. I tried to remove the existing NVidia but lost all connections to the internet in doing so. I was able to restore all info and am back to normal. I don't believe my computer has a power supply cord for a graphics card, but I may be wrong. Thanks for any help!