It looks like you posted this question in 2 different forrums.
I am dublicating my answer from the other forrum for you.
I will start by verifying a few items, if you have already taken these steps, just skip on to the next.
1. Install the mother board / chipset drivers.
If the motherboard is a super socket 7 or newer, make sure to install the AGP mini-port driver. (Even if you are using a PCI video card.)
2. Most video card drivers require DirectX.
I recommend installing either version 7a or 8.1
3. Make sure that you have the latest drivers for your video card installed.
(If you had to perform step 1 or 2, I recommend re-installing the video card driver)
4. Look for your exact monitor model in the list of monitors. (display properties / settings / advanced, monitor)
If your monitor is not listed, try the nearest "standard" monitor to the specifications of your monitor.
(Sometimes, the standard types work better than the mfg driver anyway.)
If you are stillhaving problems, check for a posted driver at www.driverguide.com
Membership is free.
Be sure to read the notes on the driver before downloading.
Chas