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but I can't find any applications to do it! Graphicaccelerator says it can but it does not work under 10.5.

Any ideas?

Is it definitely not running under Leopard? I'll try it on my G5 later today buri have it running on my Mac Pro (intel)
 
The only program I know of is ATIccelerator..... although it hasn't been updated for a while and the X1900 which I also have isn't supported yet.
 
ATi Multi dumper and flasher quit as soon as I click them. Graphiccelerator.app works but can't do anything without a ROM image from the dumper.
 
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