I found this snippet elsewhere see if that helps : "If your problem is that Windows 7 Doesn't recognize all the resolutions your monitor offers then your FIX is a little more complicated. First thing you wanna do is download the nvidia driver I listed above and save it. don't install it yet. Next thing you wanna do is download a WORKING COPY of Powerstrip. In the powertrip description it doesn't say much about Nvidia products but it works!!!! You can google Powerstrip download for different versions but the link below worked for me.
http://downloads.guru3d.com/PowerS [...] d-169.html What powerstrip does is allow you to make a custom driver for your Monitor allowing windows and Nvidia to recognize you true monitor resolutions. (ONLY US POWERSTRIP IF ALL YOUR MONITORS RESOLUTIONS ARE NOT BEING RECOGNIZED BY WINDOWS 7 AND YOUR NVIDIA SOFTWARE DRIVERS.
Install Powerstrip and follow these instructions...
1. Make your custom drivers.
a. open powerstrip and go to options then monitor information
b. then on bottom left select write custom monitor driver
c. Next to max resolution put the maximun resolution that your monior suppports.
d. Save the file in a place easy to find and name it.
2. Install your custom driver.
a. go to my computer right click
b . go to properties
c. go to devise manager
d. monitors
c. Your monitor might be listed but doubtfull. it is more than likely listed as generic non pnp devise
d. right click genericnonn pnp or your monitor if listed.
e. o tto properties
f. click driver tab
g. click update driver
h. browse my computer for software
i. let me pick from a list of devise drivers on my computer
j. click on have disk
k. brwose to where ever you stored your custom made river
l. click ok
m. install driver.
n. restart computer.
Now when you computer reboots check and see if anymore resolutions are available for you. If they are you've done it. However, if they are available to you but Windows 7 goes black or won't allow you to use them then you need to install The older version of Nvivia drivers i talked about earlier."