Windows 7 Graphic Issues

SuX0rz

macrumors member
Original poster
Mar 10, 2010
35
0
I have a 27 in, 3.06 C2D iMac with a 4850 video card. Ever since I installed Windows 7 I have this pixelated background issue with every wallpaper I use. The wallpapers are from interfacelift.com and are the correct resolution (I've tried the stock wallpapers as well). I've updated the drivers from ATi, updated bootcamp to 3.1, and I can't for the life of me fix the problem.

Ideas?

 

DannyBres

macrumors 65816
Oct 30, 2007
1,413
6
UK
Didnt really answer the question.....

Do images look sharp and good in a browser?
 

SuX0rz

macrumors member
Original poster
Mar 10, 2010
35
0
Nope, everything on the screen looks that way. Even the Windows 7 start up screen. At first I thought maybe I was running 16bit color, but alas 32bit was selected.
 

Btom

macrumors 6502a
Nov 19, 2009
571
0
I have a 27 in, 3.06 C2D iMac with a 4850 video card. Ever since I installed Windows 7 I have this pixelated background issue with every wallpaper I use. The wallpapers are from interfacelift.com and are the correct resolution (I've tried the stock wallpapers as well). I've updated the drivers from ATi, updated bootcamp to 3.1, and I can't for the life of me fix the problem.

Ideas?
Could you describe the problem? The image Ive got is just 800x450 pixels, it is hard to judge.

Tom B.
 

zaffle

macrumors member
Feb 14, 2009
52
0
i have the exact same problem under windows 7 on my 27". like you, i first thought that it must be that i was running at a low colour depth, but that wasn't it.

gave up trying to solve it a while ago since i barely use win7 as it is. good luck in finding a solution, i'm curious to hear it :)

edit: @ Tom, it looks as if the colour depth is wrong. there's lots of evidence of colour banding and it simply looks horrendous.
 

TMRaven

macrumors 68020
Nov 5, 2009
2,099
1
Did you use desktop drivers or mobility drivers? As far as color banding, I have used that very specific wallpaper before, and the picture itself has banding, so it might not be a colorbit issue.
 

Btom

macrumors 6502a
Nov 19, 2009
571
0
i have the exact same problem under windows 7 on my 27". like you, i first thought that it must be that i was running at a low colour depth, but that wasn't it.

gave up trying to solve it a while ago since i barely use win7 as it is. good luck in finding a solution, i'm curious to hear it :)

edit: @ Tom, it looks as if the colour depth is wrong. there's lots of evidence of colour banding and it simply looks horrendous.
Shouldn't image capture be 2540x1440 pixels?

Tom B.
 

SuX0rz

macrumors member
Original poster
Mar 10, 2010
35
0
To describe the problem more clearly, it is a color transition issue. So if you do a color gradient in Photoshop, instead of seeing a smooth color transition from light to dark you see banding as the color transitions. It looks like you have 16bit or to a greater extreme 8bit color. There aren't enough shades to make a smooth color transition.

It does this in everything, it is just most noticeable in wallpapers. So, I can change the image but it doesn't matter. It even does it in steam, where at the top of the app you have a color gradient that goes from dark to light. At a certain points you can see distinct lines as the color transitions.

I've updated bootcamp to 3.1, I've installed the latest catalyst drivers from ATi. I just don't know how to fix it. It's driving me crazy.

 

SuX0rz

macrumors member
Original poster
Mar 10, 2010
35
0


Should be the native res now. The thing is though, it's not the picture that is problem. So you all might see the wallpaper correctly, while I'm still seeing the issue.
 

HLdan

macrumors 603
Aug 22, 2007
6,383
0
Why not run your Photoshop in OS X? :confused: Apple is never going to give the best bootcamp drivers for Windows, why would they?
 

byron_hinson

macrumors 6502
Jun 3, 2003
295
9


Should be the native res now. The thing is though, it's not the picture that is problem. So you all might see the wallpaper correctly, while I'm still seeing the issue.
I get gradient issues on bootcamp with windows 7 too. Doesn't bother me much as i only ever notice it on wallpaper
 

SuX0rz

macrumors member
Original poster
Mar 10, 2010
35
0
Why not run your Photoshop in OS X? :confused: Apple is never going to give the best bootcamp drivers for Windows, why would they?
I'm not, it's just a frame of reference to describe the problem.
 

Btom

macrumors 6502a
Nov 19, 2009
571
0
Should be the native res now. The thing is though, it's not the picture that is problem. So you all might see the wallpaper correctly, while I'm still seeing the issue.
Thats right, I don't see it on my side at all.
Just speculating, Windows 7 must have set some global parameter on the GPU wrong. Must be something quite obscure, since it is not corrected by OSX on the startup.

Tom B.
 
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