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Ars Technica has posted benchmark tests featuring Quake 4, the Universal Binary version vs. Windows XP version on an Intel Mac with Boot Camp. In the tests, the Universal Binary still lagged behind the Windows XP version, with only a few exceptions.

There were also tests on the dual PowerMac G5 for comparison. Additionally, the author mentions drawbacks using Boot Camp to play Quake 4 under XP such as lack of official support and no anti-aliasing, among others.

If you're thinking of trying out Bootcamp and games, the main drawback of Bootcamp (other than having to reboot) is the dithering problem. It's not really noticeable when doing most tasks in Windows but it is pretty bad when you're playing games and it looks just a bit better than ATI's infamous 16-bit dithering. I'm not certain that everyone's seeing this problem though, so feedback in the discussion would be appreciated. That said, Quake 4 is very playable on an AGP first-gen dual G5 with 6800 Ultra and it's great on the MacBook in OS X. There are still issues though

Quake 4 Universal Binary vs. Bootcamp

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