Look for either a Radeon X1900, a GeForce 7800GT, or if you're really lucky, a Quadro FX4500. All of which are much more powerful cards.
More like one of these (The Mac Edition is necessary if you dont want to have to mess with flashing the ROMs etc) http://www.google.com/products/catalog?hl=en&q=radeon+x1900&client=firefox-a&sqi=2&cid=15827126317383578610&ei=vtLjTN37B6eQywW0yNyqAw&sa=image&ved=0CB0Q8gI#
Nice card but out of my price range. Seems like Moore's law has forsaken me. A decent priced PCI/E 512 Vid card-does it not exist for under $300?
You seem awful set on having 512MB of RAM. Why? RAM isn't always going to make it a better card. For example, the G5 version of the X1900 is almost 20% faster than the 6600 you've got now, and its still 256MB.Except that is only 256-the NVIDIA 6600 I have is a 256 MB. Is there not a 512 Card made to work with OS X? I've found that they have to be for OS X and I don't have the capability or knowledge to flash one.
I don't have the capability or knowledge to flash one.
Newton do u have PCI -X or PCI-E mac??