On Apr 9, 2010, at 5:19 PM, Frank J. R. Hanstick wrote:
I have a PCI Radeon 9200 and a AGP Radeon 9800 Pro already installed to run three displays.
You might want to check whether Quartz Extreme is working using Quartz Extreme Check 1.2. Normally no PCI cards are enabled for Quartz Extreme unless you use PCI Extreme 3.1 available at MacUpdate. I believe that when a PCI card is used in conjunction with an AGP card, the mere presence of a PCI card kills off Quartz Extreme for the AGP card also. This means your two fancy cards are most likely operating with ZERO acceleration for both Quartz Extreme and Core Image (for the 9800 Pro). It might be better to only use two displays with the AGP card only, or enable Quartz Extreme for the PCI card using PCI Extreme (if you're using Tiger 10.4.11, PCI Extreme doesn't work with Leopard).
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