MSI 8500GT and Viewsonic 24" Problems

I have a MSI NX8500GT-TD256EH (GeForce 8500GT) connected to a ViewSonic VX2435WM. The monitor has a HDMI input and I am using the included DVI to HDMI cable. The native resolution is 1920x1200. I'm running Vista 32-bit with 163.69.
Before I load the Nvidia drivers, the picture looks normal. However, once I load the drivers, the picture becomes distorted (blurry text, messed up colors, etc). When I look at the resolution notice on the monitor's OSD, it says it is running at 1200p. Before the Nvidia drivers are installed, it says it is running at 1920x1200.
I've looked all over the Nvidia control panel and I believe the software thinks the video card is connected to a HDTV, rather than a monitor. It shows that it is being connected via HDMI, even though the output on the video card is DVI.
I have connected the monitor to some other other computers and it works fine on both a Radeon 9600 and a MSI 8600GT. They are all connected the same way: DVI output from video card into HDMI input on monitor. When it is connected to these computers, the monitor's OSD correctly recognizes 1920x1200 and the Nvidia control panel shows it is connected via DVI.
I have tried a few different versions of the latest ForceWare drivers and also tried BETA drivers. Right now I am running 163.69.
Any suggestions on what I can do to get a clear image? Right now the only thing that works is uninstalling the Nvidia drivers and using the standard VGA drivers from Microsoft, which obviously isn't an option.

There's a slight chance that the nVidia driver can't read what modes the screen can display - although it seems unlikely.
I had problems with an NEC HDTV (1366 x 768 native resolution), which would work perfectly with a 1360 x 768 analogue VGA input, but if I tried the DVI-D input, the card (7300GS) sent out 1280 x 768, and the picture panned when the cursor went off screen. This was nVidia's response...
Thank you for contacting NVIDIA Customer Care. NVIDIA GPUs allow resolutions depending on a monitor EDID. An EDID is an electrical signal sent by a monitor/tv which tells it which modes it supports. While set top players designed specifically for HD modes may not need this, PC's do since they support many more types of video display modes and to prevent damage to a display, will only send out a signal that a monitor tells the graphics card it supports. An HDTV generally only accepts HD signals through the DVI or HDMI input and therefore it's EDID through this input only accepts HD resolutions such as 720p (1280x720). However through your VGA input, it will allow different resolutions and therefore the EDID that the HDTV sends to the graphics card through the VGA input is different from that of the HDMI/DVI output. This is why the graphics card gives you different options depending on which input you have it hooked up to. If you wish to use your HDTV for only movies, we recommend using the DVI input however if you will be using it as a PC monitor where you may need to read text or view small objects, then it is recommended that you use the VGA input which will allow you to run without any scaling. Unfortunately, there is no workaround for this situation as everything is working as designed.
Sometimes the technology is too clever by half!
However, this doesn't explain your problem if you can get it to work with a different card, but the same driver.
The only other thing I can think of is that the monitor isn't mapping the incoming pixels to the display pixels properly, although that should only apply to analogue inputs, since with DVI/HDMI, each pixel value is sent as a binary number, and it's position is inherently defined. With analogue signals, there's no separate clock signal to tell the monitor exactly when to sample each pixel, hence the Clock and Phase adjustments.
Maybe it is the HDCP nobbling the resolution - if the monitor doesn't tell the 8500GT that it supports HDCP, the 8500GT might decide to throttle back the resolution. Grrr!
Probably not much help I'm afraid, maybe someone else has some ideas.
Cheers

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    Quote
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    Quote from: Nichrome on 19-July-14, 02:32:51
    Don't have to be rude 
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    >>Posting Guide<< Reminding again if you want to receive any help.
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