ATI Radeon 9600 XT & SyncMaster 305T - problems

You need a graphics card with dual-link DVI. Starting with the fastest:

ATI Radeon X800 XT 256MB (ADC, dual-link DVI)
<http://www.welovemacs.com/0831xeghr.html>

NVIDIA GeForce 6800 Ultra 256 MB (Two dual-link DVI)
<http://www.welovemacs.com/6613332.html>

NVIDIA GeForce 6800 GT 256 MB (Two dual-link DVI)
<http://www.welovemacs.com/6613441.html>

ATI Radeon 9650 XT (Single-link, dual-link DVI)
<http://www.mac-pro.com/ATI-Radeon-9650-256MB-for-G5-661-3593?sc=2&category=42>

ATI Radeon® 9600 Pro PC & MAC Edition RoHS 256MB AGP (Single-link, dual-link DVI)
<http://shop.ati.com/product.asp?sku=3170809>

The ATI Radeon 9600 XT does not have dual-link DVI. You can't tell just by looking at the connector. The dual link holes may be there, but nothing is connected to them. The only 9600 with dual-link DVI is the ATA Radeon 9600 Pro PC & Mac Edition, which was never installed in any computers sold by Apple, though they did sell the board for a while as an upgrade.

If you decide to make the jump to Leopard, don't freak out if your ATI card doesn't act quite right, especially when using Time Machine and Front Row. It's a known issue when using a 30" at the native (2560) resolution. Now whether Apple and ATI/AMD are working on it is another question entirely.

Enjoy!

I guess I have the same issue with Roman more or less.
I have a Dual 2 GHz PowerPC G5 with an ATI Radeon 9800 XT
and it has one DVI and one ADC port in the back and I just got a
30" apple display. The resolution was as Roman said very low.
So I would need to get another card with dual DVI links, right?
Is it something I can easily install myself or do I need an expert?
Also where is the best place to get the card?

Welcome to the forums, Rabidart!

First off, you're probably better off starting a new topic for your question, since this one is marked as "answered" and many folks won't see your new question at the bottom.

But since I'm already here...

Secondly, I notice that you're running Leopard. I'd recommend staying away from the ATI cards if you're powering a 30" on a G5. For an explanation, check out this thread:
http://discussions.apple.com/thread.jspa?threadID=1195747&start=0&tstart=0

You have two options: deal with the inherent ATI issues until Apple or ATI/AMD address them, or get a compatible nVidia GEForce AGP card with Dual-Link DVI. There are many on eBay, and a few users in the thread listed above have installed them with a 100% success rate (so far).

By the way, a replacement card, once you find one, is VERY easy to install. Retail packages will include instructions, and many of the sellers on eBay include instructions with theirs.

Good luck!

Thanks Kwamster for the helpful info.
It might have saved me some headaches if I had gotten the cards that everyone is complaingin
about.
So If I get the nVidia GEForce AGP card with Dual-Link DVI those haven't gotten much issues
at all like the ones described on the link you posted?
Want to make sure.
I also started a new topic just replied to roman's after I read his thread.