WMudrockJr, thank you very much for your help and I really appreciate your fast reply. Unfortunately, my AMD Radeon HD 8570 only has a VGA and a HDMI output, no DisplayPort. I purchased it because it had 2GB RAM and I thought it would provide the best streaming video performance.
I had an option to put in an AMD Radeon HD8470 in my new Lenovo system, which would've provided me with DP and VGA, but only 512MB RAM.
Can you advise me which is a better option? We want 2-3 monitors and to be able to stream graphics quickly and smoothly.