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9800 gx2 HDMI display issue Fix

post #1 of 19
Thread Starter 
hi! i recently traded my 8800 ultra for a 9800 gx2 and after installing it. My picture was off center and the icons are pixelated. To make my story short the picture SUCKED!
so anyways i called evga tech and they cant help me fix the problem. But one of the techs suggested a FIX posted by one of the members on the forums.

It involves changing the .inf file. I did it and it WORKS!

heres the procedure:

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:

*For LG 24" lcd

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.

For Viewsonic VX2835wm it was

Code:

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

I hope this helps other people having HDMI problems.

*Credit goes to Bryanb @ nvidia forums
Edited by dranom - 5/15/08 at 10:14pm
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post #2 of 19
So is this a TV's EIDE or driver issue?
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post #3 of 19
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
So is this a TV's EIDE or driver issue?
its a driver issue. coz i tried beta and official drivers
And the pictures is all the same
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post #4 of 19
sorry for the bump, but i just wanted to express my appreciation for this fix!

I have been in constant contact with EVGA tech support regarding this exact issue since the card was released, and this finally fixed it!

in short, OMG TY SO MUCH!!1!one
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post #5 of 19
Thread Starter 
Quote:
Originally Posted by default501x View Post
sorry for the bump, but i just wanted to express my appreciation for this fix!

I have been in constant contact with EVGA tech support regarding this exact issue since the card was released, and this finally fixed it!

in short, OMG TY SO MUCH!!1!one
its all good man! as long as it helps someone! just keep bumping!
One of the EVGA tech guys told me about this i just found the exact fix on one of the post on the forums.

Enjoy!!!
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post #6 of 19
nice fix man. bump and +rep for you.
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post #7 of 19
Quote:
Originally Posted by dranom View Post
its a driver issue. coz i tried beta and official drivers
And the pictures is all the same
That doesn't mean it isn't a EDID issue... it could be the EDID telling all the drivers the wrong specs. I wish TVs followed the EDID rules better like monitors.
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post #8 of 19
WOW!!! Ive accually been to the fact where i returned my 9800 GTX because I thought it was bad.. I just recently *tonight* found out that it was the hdmi signal LOL... wow thanks a bunch man, +rep for you!!!!
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post #9 of 19
I hate to bump this baby but I am afraid I need some help figuring out my four digit number for my 47" Phillips using the Using Phoenix EDID Designer.

Any help is appreciated. Thank you.
post #10 of 19
Hey, I also need help with the Phoenix EDID Designer.
You say "The bytes are in byte 8 through 11." but I can't figure out what you mean by that. Which ones are the ones I need?
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