Hello, I'm running a DVI-HDMI cable from the second output on the 7300GT. The primary screen displays fine except when the HDTV is on. Once the HDTV is on and the displays are mirrored, the primary screen has two black bars on the top and bottom, while the picture on the HDTV is slightly cutoff. I have a Dell 2407WFP as my primar and a Sammy 4665F HDTV. Any thoughts?