At Macworld Expo, ATI announced, and showed off, the Radeon 9800 Pro Mac Special Edition graphics card, boosting 256 MB DDR-SDRAM graphics memory, which will work in the Power Mac G5 only - 8X-AGP support (533 MHz bus). Quote from Article:
Hardcore gamers who own a Dual-1.8 GHz G5 or better, with a fat wallet, this is the card you want.Retailing for an estimated $469 and available only for the G5, the card will be available intially as a BTO upgrade, and then later as a separate retail purchase. The current initial availability is hoped to be around mid-February.
When asked about its G5 exclusivity, ATI responded that they feel the current installed base of G5 users is large enough to support the release of a powerful G5-only card.