Thanks Cambo. It worked.
I can run glxgears now but the resolution is stuck at 800x600 (as reported by others). The EDID readings in my xorg log states that my max pixel clock at 0.00 Mhz so all modes removed. Tried "false" options for "UseEdid" or "UseEdidDpi" but X doesn't change.
I don't know if it's something simple I missed like "nv" to "nvidia".
Appreciate your help.