That's pretty much the conclusion I'm coming too. I've got two displays hooked up, one HDMI and DVI. The HDMI is 1080p 40 inch LCD and I get noticeable horizontal line separation when movies have an action scene.
I only paid $70 for the card so I don't think ebay will loose me too much money. The card plays Prototype and Counterstrike Global offensive well but I know it will not handle newer games.
Thanks for your help!