http://www.apple.com/downloads/macosx/apple/application_updates/leopardgraphicsupdate10.html graphics update
to check your device id go to about this mac, then more info, then click graphics/displays then look for Device ID should be in this format 0x71c6

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Current Rigs:
Main Hack:
Processor:Intel Core 2 Duo E8400 Wolfdale
Motherboard:Gigabyte EP35-DS3L
Ram: Gskill 4GB DDRII 800 PC2-6400
Video Card: Nvidia GeForce 8800GT 512MB
Running Retail OSX 10.5.6 PC-EFI V9

TV Hack:
Processor: AMD Athlon x2 3800+
Motherboard: MSI K9mm-V
Ram: 1GB DDR2 667
Video Card:ATI Radeon X1650 (AGP)
Running iDeneb 10.5.6 with Voodoo XNU 9.5.0 Kernel