ATi Radeon 4000 Series Anti-Aliasing Investigation
Benchmarks (Part 1)
Since the edge detect modes are seldom playable in new titles, I’ve picked a selection of titles from 2004 and 2005 to test the various AA modes. When viewing the benchmarks, keep in mind that a 4890 is around 40%-50% faster than the 4850, especially with heavy AA, so you can use that to estimate what it would score.
Also I’m not going to benchmark AAA for the simple reason that it depends entirely on scene as to what kind of performance hit you’ll experience. The odd fence or grating won’t impact performance much, but large amounts of vegetation will incur a steep performance hit. For this reason, you’ll quickly know if your AAA setting is usable or not just by playing your game.
In Call of Duty 2, 12xAA is actually faster than 8xAA.
In Doom 3, 12xAA is about the same speed as 8xAA, and even a 4850 can comfortably run this game at 24xAA.
In Far Cry, the edge detect modes incur a steep performance hit over the box modes.
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