Gunnersmith, Not sure how your friend is able to run his refresh rate at 75 unless he is using a different visual setting (1280x1024). The native setting for your monitor is 1680 x 1050 at 60Hz (looked this up on the monitors web site).
You are running the same video card that I use, so let me ask you a question what version of the Nvidia driver
are you using? You might want to check to see if it is up to date (just because you have a new system doesn't always mean the drivers
are up to date).
If you drivers are up to date check to see if you have the Nvidia Control Panel, and if so check all the settings in the control panel. You may be able to find what you are looking for in the Nvidia control panel. If the control panel is not there then go to the Nvidia site and download the new drivers (they come with the control panel).
I run two monitors off the same card; a 28" Hannspree (1920 x 1200) and a Gateway 22" (1680 x1050) without a problem.