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Page 3 of 5 - AoE III, DoD:S, Lost CoastAge of Empires IIINext on the list is Age of Empires III - Again utilising HDR rendering, and recording playback using FRAPS while replaying a recorded game. 
The X1900 XTX nets just over a 5% performance gain over the XT at 1600x1200 with AA and AF. 
The performance gap is smaller at 2048x1536, down to 4.5%. 
That delta shrinks further with anti-aliasing and anisotropic filtering enabled here, bringing performance much closer to the core clock speed difference between the two SKUs at just over 4%. Day of Defeat: SourceWe move on to a couple of Source engine-based titles - First out of the hat is Day of Defeat: Source, using a custom timedemo, with HDR rendering enabled. 
Even with anti-aliasing and anisotropic filtering enabled at 1600x1200, this title seems to be somewhat CPU limited at this resolution - Thus, we only see less than a 2% performance increase using the X1900 XTX over the XT. 
CPU limitation is still an issue at 2048x1536, with no appreciable difference in performance between the two SKUs. 
The X1900 XTX finally gets to strut its stuff with 4x AA and 8x AF at 2048x1536, putting together a (relatively) healthy lead of close to three frames per second, over 5% faster than the XT. Half-Life 2: Lost CoastContinuing with the Source engine, we now move on to a custom timedemo utilising the intensive Half-Life 2: Lost Coast level. 
1600x1200 with 4x anti-aliasing and 8x anisotropic filtering gives us a 4.6% performance advantage for the Radeon X1900 XTX. 
2048x1536 without AA or AF gives us a smaller benefit from using the XTX part, down to just under 4%. 
Adding AA and AF to the mix brings the XTX's advantage up to 4.6%, most likely due to its higher memory clocks which will benefit most when anti-aliasing is in use.
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