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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?

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What kind of graphics card is in the laptop? – cmorse Dec 9 '11 at 17:58
Intel GMA 4500MHD Dynamic Video Memory Technology 5.0 – meddle Dec 9 '11 at 19:29

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