I want to use my 27'' LED ACD with a pure Windows machine. I'm looking at getting this graphics card: http://www.newegg.com/Product/Product.aspx?Item=N82E16814161371 I've read things about brightness issues and being able to control it. Do I need to worry about this if I have the correct graphic card. How can I fix it if there is an issue. Anybody have any ideas? Thanks.