I have a Lenovo T400 and Toshiba Dynadock. I just bought a Dell Ultrasharp U2412M for it and it seems that there is a little bit of a lag in rendering. I want to add another 24 inch monitor to it but I'm worried that my configuration will not work for two monitors and the rendering will be slow.
Do I need some kind of a graphics card adapter so that both monitors will run smoothly?