2nd graphics card doesn't work after upgrade to 10.6

I ordered my Mac Pro with two ATI Radeon HD 2600 XT graphic cards and they always worked great. After I upgraded to Snow Leopard, it always shows a display connected to the second card even when there isn't. This wasn't an issue until I started having windows displayed on that "ghost" screen that I couldn't see. In the System Profiler, It no longer recognizes the graphics card like it should and reports the wrong amount of memory (1024 instead of 256MB... I wish) and of course reports a "Display" that doesn't exist. Since from time to time I like to connect my TV to my Mac - for movies or whatever else - I connect it to this second graphics card but since 10.6, it hasn't worked.
In short: my second graphics card isn't recognized correctly; it has a ghost display with or without a display connected to it; will not connect to a display.

I'd assume you do have a bad card now. Maybe wait and see if newer ATI cards come out, or opt for 4870 or flash one of the 1GB models that can be flashed, and save couple $100.
http://forums.macrumors.com/forumdisplay.php?f=1

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Graphics card doesn't work after cleaning

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Be aware that using compressed air (especially if using canned air) can cause condensation causing a short if the card is installed shortly afterwards. In this case warranty would be void. Try without the GTX760 and see if computer works fine (in case cpu has integrated gpu or you have another vga). If so make sure card is dry and retry. If no help try the card in another system.

Mail server doesn't work after upgrading from SL to ML

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hello..
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"Cynthia" <[email protected]> wrote:
>
Hi,
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