[Moved to the Hardware forum.]
>dual graphics together
You MAY have problems with a computer like that
-link to why http://forums.adobe.com/message/4685328
Can you find another inexpensive computer with at least an Intel processor and hopefully and nVidia GPU. You would be much better off running Adobe Premiere as the Intel processor is better tuned to the Adobe software and the nVidia GPU's with more than 1 GB of video RAM can be used hardware acceleration of the Adobe Mercury Playback Engine (MPE) software.
Many thanks for your advice and sorry for delayed feedback.
Yes, Bill, I'll keep looking for a machine with a more compatible card and I'Il run some more by you as I look for possibilities if okay.