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Changed graphics card. Now Adobe Gamma doesn't work

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The NVidia Geforce MX-400 graphics card in my PC developed a noisy, worn fan bearing so I pulled it and fitted an ATI radeon 7200 in it's place, which I found in my spares box. The radeon works fine but ever since fitting it I can no longer use my Photoshop "Adobe Gamma" monitor calibration utility. It simply has no effect on the gamma or colour temp. of my display. I can adjust the display colour temp. with my monitor's hardware controls, but software-based alternatives don't have any effect any more (Adobe Gamma, Colorjin Calibrize, Paint Shop Pro "Gamma Adjust" -- none of them do anything). Anyone got a clue why they don't work with my Radeon card but they did work with the Nvidia card?
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Try to un install all nvidea software and drivers and then try and install the radeon 7200 ati driver.
I had a problem and when switched from nvidea to radeon and had various problems with the display. That was the only thing I got to work.

The problem is changing the gamma settings on the regular view or while using the editor programs?
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