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9800GX2 Issues with moniors greater than 24" resolved plus more info

post #1 of 2
Thread Starter 
1. First and foremost a great thanks goes out too secretsexyninja. I used this information posted by ssn that he found in another forum.

Quote:
Originally Posted by secretsexyninja View Post
okay read post #16 on the first link. Actually skim through that whole thread. The thread is talking specifically about monitors that have had the same issue. With post #16... the second half deals with editing INF for the viewsonic.

http://www.evga.com/forums/tm.asp?m=294136


the original fix is found here: http://forums.nvidia.com/index.php?s...st=20&p=336967
Which basically transfers into this information

Quote:
Hey guys,

I've discovered a workaround for this problem. Basically you can use a registry key to override the monitor advertising itself as an HDTV (by setting the number of EDID extensions to 0). Using the following steps, I am now getting proper 1920x1200 resolution on my LG monitor:

1. Start the installation of the latest Nvidia drivers and cancel out once the files are extracted
2. Open nv_disp.inf. By default for the current drivers this is in C:\\NVIDIA\\WinVista\\169.25
3. In the [nv_SoftwareDeviceSettings] section add the following:
CODE

HKR,, OverrideEdidFlags0, %REG_BINARY%, 1E,6D,3F,56,00,00,FF,FF,04,00,00,00,7E,01,00


NOTE
The first 4 bytes (1E,6D,3F,56) in my OverrideEdidFlags0 are specific to the LG monitor I'm using. For other monitors, you will need to replace them. Using Phoenix EDID Designer, extract the current EDID and open up the byte viewer. The bytes are in byte 8 through 11.

4. Uninstall your current drivers and reboot
5. Install the modified drivers by running the previously extracted setup.exe. By default for the current drivers this is in C:\\NVIDIA\\WinVista\\169.25. You'll get a warning about the driver not being signed because of the modified inf. Just press OK.
I then used these settings for my 28" viewsonic...

Quote:
For my Viewsonic VX2835wm it was

HKR,, OverrideEdidFlags0, %REG_BINARY%, 5A,63,1F,0F,00,00,FF,FF,04,00,00,00,7E,01,00

It worked exactly as you described:

I took the bytes 8 to 11 of the Phoenix EDID Designer byte viewer (5A,63,1F,0F) and replaced the first four bytes of your example (1E,6D,3F,56).

Now every resolution is working as you'd usually expect: The picture is always stretched to the exact size of my display. In native display resolution (1920x1200) I get a totally brilliant picture.
Since I had this information available I did not need to run phoenix EDID. I also replaced the code and didn't have to uninstall drivers. Basically added the script using the Viewsonic settings and ran the exe. Worked out Great!!!

2. I am using the 6pin to 8pin adapter, no problems whatsoever
3. PhysX runs fine causes no problems
4. Virgin run out of the box for 9800GX2 yielded a 3DMark06 Score of 17357 on stock settings.
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CPUMotherboardGraphicsRAM
i5-3570K ASUS P8Z77-V GTX 680 G.Skill Ares 
Hard DriveCoolingPowerCase
Mushkin Chronos 120GB Zalman CNPS12X Cooler Master Silent Pro Gold - 800W Coller Master Haf XM 
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post #2 of 2
sweet, good idea to put together a little faq thing. glad its working for ya
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