On Aug 22, 2010, at 5:15 PM, Kris Tilford wrote:

> On Aug 22, 2010, at 12:55 PM, Eric Herbert wrote:
> 
>> due to the lack of an AGP slot on the motherboard, you can never have 
>> Core-Image or even Quartz-Extreme graphics.
> 
> You can enable Quartz Extreme using PCI Extreme 3.1, and some PCI nVidia 
> FX5200 and 6200 cards support Core Image over PCI on "New World" Macs such as 
> the B&W/Yikes and later, but won't work for "Old World" Beige and earlier.
> 
> This may provide some information, dead links are available via Internet 
> Archive Wayback Machine:
> <http://www.xlr8yourmac.com/Graphics/Mac_PCI_FX5200/mac_PCI_FX5200.html>
> 
> Both Quartz Extreme & Core Image work on hackintosh under Snow Leopard with 
> an FX5200 or FX6200 PCI.
> 
> Anyone using a PCI card in a Mac should be aware that normally using a PCI 
> video card that doesn't support Quartz Extreme & Core Image will disable both 
> QE & CI for the AGP or PCIe graphics card also. If you're using a PCI card in 
> a Mac as a 2nd graphics card it's important to have one that will enable QE & 
> CI, or you will loose acceleration for both cards.

Yes, you can enable QE/CI on the PCI bus, but the problem (and hence why Apple 
chose to not support either on the PCI bus) is that it hogs bandwidth from the 
rest of the PCI bus to do it causing the rest of the computer to slow down.  So 
yes, while you CAN do it, it's just not a good idea.  The only exception to 
that is if you're using a PCI card in an AGP system as a second card.  In that 
case it won't impact performance on the rest of the machine too badly since it 
isn't working full time to draw the main working window.  That said, there will 
still be a performance impact on the PCI bus by doing so.

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