Problems running HD2600 XT under Windows on 2006 Mac Pro

[Mackilroy]

So, here's the scoop. I ordered the HD2600 a while ago and got it yesterday, and quickly installed it. At first, the card worked with both OS X and Windows, but after I stuck my Leopard DVD in the drive to update the drivers because it wasn't letting me switch the screen to the maximum resolution, it stopped working. To describe: I turn on the computer, I see the initial boot screen, then the screen remains blank and I can't see anything. I can take a video of it if need be.

I did try installing ATI's catalyst drivers and then hooking my Mac Pro up to two screens (one on the HD2600, one on the 7300 GT) to see if that would let me mess with the card, but that failed.

So, any ideas?

 

[Mackilroy]

So, no ideas from anyone?

 

[newtech]

Which leopard DVD the original 10.5 or the newer 10.5.1 retail disc?

 

[xraydoc]

Works fine for me...

Mac Pro 2.66Ghz Quad (original model)
Radeon HD 2600XT in slot 1 (16x slot), no other cards
Windows XP sp2, ATI Catalyst version 2007.1101.2317.39832

And this is on a 30" display as well.

 

[Mackilroy]

I have the original 10.5 disc.

The thing is, I see the initial boot-up screen, but I don't see anything after that.

You only have one card installed? Okay. I still have my 7300 GT in the machine, so I'll remove that and see if that helps.

EDIT: Well, whaddya know, that worked. Guess you can only use one under Windows.

Thanks.