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Graident Banding


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#1 Iceman692

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Posted 23 April 2010 - 04:16 PM

I just purchased an EVGA nForce 730i w/ Nvidia GeForce 9300 for my HTPC. I installed the NVIDIA graphics driver and am having horrible gradient banding. It's noticable on a lot of Windows 7's gradient wallpapers and all the moving gradients in WMC. I never do much with video cards, so I would appreciate any help I can get to resolve this issue. I have a feeling it's fairly simple. I'm using a flat screen Samsung 23" TV with the PC and connect it via HDMI.

Thanks in advance!

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#2 computerxpds

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Posted 23 April 2010 - 05:51 PM

make sure the video card is seated properly.

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#3 MrBruce1959

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Posted 23 April 2010 - 05:58 PM

I just purchased an EVGA nForce 730i w/ Nvidia GeForce 9300 for my HTPC. I installed the NVIDIA graphics driver and am having horrible gradient banding. It's noticable on a lot of Windows 7's gradient wallpapers and all the moving gradients in WMC. I never do much with video cards, so I would appreciate any help I can get to resolve this issue. I have a feeling it's fairly simple. I'm using a flat screen Samsung 23" TV with the PC and connect it via HDMI.

Thanks in advance!


Banding like a wavy set of lines moving about on the screen?

Like a herring bone effect you mean?

What is your screen resolution's refresh rate set to?
I am refering to the settings with-in windows, not the monitors settings.
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#4 dpunisher

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Posted 23 April 2010 - 06:14 PM

First, make sure driver is properly installed. Verify the color is set to 32bit (bpp) and not 16bit.

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#5 Iceman692

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Posted 23 April 2010 - 06:41 PM

I am using a built-in graphics processor. The color is set to 32 bit. Refresh rate in windows is 60 Hz. I only have a 60 and 59 hz option.

This is a picture of a problem similar to what I am having: http://static.photo.net/attachments/bboard...AN-37757684.jpg

Basically, when there is a gradient, instead of being smooth and gradually changing colors, it does it drastically at intervals. The best way i can visually describe it, is that instead of being a simple inclined plane, it has more of a stair effect where it steps from one color to the next. The effect I am seing shifts when I open windows or move them over the gradient.

#6 dpunisher

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Posted 23 April 2010 - 06:51 PM

Oh, I do know exactly what you are saying. It's like in pictures with a sunset, instead of a continuous color change you get banding in dark-light gradiants. Usually it is the 16bit color setting causing this or in cases with video, overcompression. Wish I had more suggestions, but those two things (drivers/32bpp) usually take care of the problem.

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#7 MrBruce1959

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Posted 24 April 2010 - 05:24 AM

I was wondering what would happen if you tried a different Nvidia driver version for your video card. Perhaps this driver is causing this to happen. It's worth a shot, just make sure you un-install the driver you are using now.
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