High End Performance TestsAnd now, we come to the extreme tests. Unfortunately, we couldn't push our tests beyond 2048x1536 this time around, so the 7800 GTX SLI setup is still not stretching its legs to its full potential (which is extremely impressive). For our 1920x1440 test (a little larger than HDTV's 1080p), the trend continues from the previous tests. This time around, we see that the SLI setup is steadily becoming less CPU bound under our AA/AF test. Without turning these features on, we do still bump into the CPU limit, however.
And our current highest end test, 2048x1536 still shows an incredible frame rate under the 7800 GTX SLI. Increasing AA/AF settings still can't hurt it too much, and even the single 7800 GTX is playable with all the options on at the highest resolution test that we ran. The 6800 Ultra and X850 XT are only playable at this resolution without AA enabled (though, the ATI part comes closer to being playable). It should go without saying that the mid-range cards are unplayable here.
For high end cards paired with a monitor that can handle it, 1920x1440 offers good AA performance. If the investment in a 7800 GTX seems worth it, nothing looks better than 2048x1536 with 4xAA/AF. Oddly enough, we can still see the difference between aliased and antialiased game play at these huge resolutions. Of course, the problem is only obvious on near vertical or near horizontal lines and is much less of an issue at huge resolutions than at, say, 1024x768.