So I got the Sapphire 5850 and this (http://www.newegg.com/Product/Product.aspx?Item=N82E16812270279) and it's not working very well. I got it to work once after fiddling with it, but now it's back to not working. The card just does not detect it, or if it does, it will only let me use 640x480. I know that it at least partially works because when I plug the monitor into the adapter (without the other end plugged it) the monitor will try to detect a signal.
I have used 9.12 drivers and 10.1, and still no luck.