Get a 2 port DVI switch. Very easy to connect, good cables and the switch itself is a bit heavy so it doesn't bang hard on my desk. Slight lag when connecting each computer individually, but with a newer Windows 7 box everything worked fine for a few minutes. The Windows XP box initially skipped no sound, but the FAQ on Aten's support site had the answer: Hold down this computer's button (the button on the face of the switch) until both lights for that button come on (a little twitter confirmed it took). The sound followed almost immediately. Maybe it's in the manual, but I didn't read every page :) Everything works great now, even with my wireless keyboard. To do this, I had to plug the receiver into the switch's front USB mouse port. The USB keyboard port on the switch only recognizes a wireless keyboard, not a mouse. I really like that I'm using my old XP box more now. I have both desktop PCs on a desk and the cables are long enough to have almost 5ft of space between them. Before buying this I was tempted to use one of the cheaper DVI switches but from other reviews I'm glad I didn't. I don't write many reviews, but it was nice that this thing just worked without too much grief. Very satisfied.
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