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GPU Defect or Video Card Driver Error (PowerColor ATI Radeon HD 7770)

Last response: in Graphics & Displays
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January 4, 2014 4:13:56 PM

Hi all,

I just bought a new video card, it works fine if I set the resolution to 1920x1080, 1024x1080 or 1280x720 but not 1600x900! or 1280x768 or 1280x1024 or 1280 x 960.

If I enable the GPU Scaling, it will also have the same 'error' effect or change the color pixel format other than YCbCr 4:4:4 e.g. RGB 4:4:4 or YCbCR 4:2:2

This is what it shows when i setup my resolution to 1600x900, this kind of error is also appearing when I play games on certain resolution.

http://i41.tinypic.com/1zf4t3s.jpg

VGA Card is connected via HDMI and using AMD Radeon Latest Driver.
January 4, 2014 4:36:03 PM

Try changing the refresh rate of your monitor, and colour bit depth and see what results you get.
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January 4, 2014 4:46:39 PM

lilpopjim said:
Try changing the refresh rate of your monitor, and colour bit depth and see what results you get.


Currently 1920x1080 at 60herz works fine but if I change my refresh rate to 59 or 50 hertz, i will get the same 'error' colour screen.

1600x900 works fine with 50 hertz but not with 60 hertz... on Windows.

Why is that the case? I thought 60hertz is superior than 50 hertz, therefore if my monitor works at 60hertz it should be working fine with 50 hertz?

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January 4, 2014 4:53:44 PM

Superior in the sense that you'll get 10 fps less when gaming and a slightly less smooth image, but you wont notice the difference unless you switch from a 50/60hz screen very very regularly. And also if you care about fps more than you do gameplay than everything will be a okay.
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January 4, 2014 5:01:18 PM

So what to do in this case? for example: if my windows setting is at 1920x1080 and my game is in 1600x1200, do i need to change my the refresh rate manually in order to work? or is there any better way to change this automatically?
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January 4, 2014 5:19:34 PM

Not that i know of no. Question though, why would you want a full HD monitor and play games in a lower quality?

But if you manually set the refresh rate to 50hz it should stay like that unless a game overrides that setting, because i know in some games you can choose the refresh rate of your monitor. What happens if you try a different screen? Like a TV for example does the same thing occur?
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January 5, 2014 1:31:32 AM

lilpopjim said:
Not that i know of no. Question though, why would you want a full HD monitor and play games in a lower quality?

But if you manually set the refresh rate to 50hz it should stay like that unless a game overrides that setting, because i know in some games you can choose the refresh rate of your monitor. What happens if you try a different screen? Like a TV for example does the same thing occur?


I initially thought there was something wrong with the HD7770 GPU because my monitor works OK (various resolution and refresh rate) with onboard GPU

then I connected my HD 7770 GPU to my Samsung LED TV, it works fine too!!! with various resolution and refresh rate.

Now I am back to square 1 again!! any idea? I have installed the latest driver as well as Monitor Driver on my PC.


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January 5, 2014 1:58:11 AM

Yeah i can imagine!

So each resolution including the 'faulty' one worked on the samsung? If that worked fine then i would imagine something is wrong with the monitor then, at least there's a work around though.

Did you use the same cable with the samsung?
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