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ATI、nVIDIA谁家画质高?


http://www.sina.com.cn 2006年08月23日 11:44 IT168.com
作者:大文轱辘   

  【IT168 资讯】要衡量现代的显卡是一件非常困难的事情,管线、顶点、频率、显存都不能表现一款显卡的性能如何,而使用3Dmark等软件又不能代表实际游戏性能,实际游戏测试又是纷纭复杂,而且,性能并不是一款显卡的全部,画质更是非常重要的。

  A卡和N卡到底谁家的画质高?恐怕这是一个非常难以回答的问题,A饭和N饭们也为此争得头破血流。firingsquad做了一个画质对比测试,专门对照双方游戏截图的细节。为了消除静态照片看不出来的Texture shimmering现象,测试多使用视频来截。同时测试人员声称,因为针对的画面的细节而不是整个画面,因此并不能够最为客观的表现整体的画质表现,或许这只能靠大家自己来体会了。

测试采用的Intel Core 2 Extreme X6800处理器、ASUS P5W DH Deluxe 、和P5N32-SLI SE Deluxe主板,显卡分别为Geforce 7900GTX 512M和未透露型号的最新ATI显卡,驱动分别为91.33和6.8,面板中开启adaptive AA和Super-sampling、抗锯齿gamma修正选项。

所有对比大图地址:http://www.firingsquad.com/media/article_image.asp/1973/01

首先是COD2:

ATI、nVIDIA谁家画质高?

ATI、nVIDIA谁家画质高?
0xAA、16xAF

ATI、nVIDIA谁家画质高?
4xAA 16xAF

ATI、nVIDIA谁家画质高?
4xAA 16xAF

ATI、nVIDIA谁家画质高?
4/6xAA 16xAF Transparency/Adaptive

ATI、nVIDIA谁家画质高?
4/6xAA 16xAF Transparency/Adaptive

ATI、nVIDIA谁家画质高?
0xAA 16xAF
ATI、nVIDIA谁家画质高?
0xAA 16xAF
ATI、nVIDIA谁家画质高?
4xAA 16xAF
ATI、nVIDIA谁家画质高?
4xAA 16xAF
ATI、nVIDIA谁家画质高?
4xAA 16xAF Transparency/Adaptive
ATI、nVIDIA谁家画质高?
4xAA 16xAF Transparency/Adaptive
ATI、nVIDIA谁家画质高?
ATI、nVIDIA谁家画质高?

  视频对比:http://media.firingsquad.com/2006_08/img_quality_ati/ati_x_card.avi
http://media.firingsquad.com/2006_08/img_quality_nvidia/geforce_7900gtx.avi

 The image quality comparison is almost certainly a draw on all but one account. NVIDIA’s AA routine, especially with Transparency AA activated, is better at drawing very fine lines, like those in the Half-Life 2 fence screenshot. Whether it’s the thin left side of the fence or the small branches on the trees, NVIDIA shows you more, and even more importantly, what they show is in sharper contrast than what ATI’s routines deliver. However, ATI generally has better AA smoothing once you bump things up to 6xAA. I’m going to call it a wash here.

NVIDIA’s anisotropic filtering looks better in screenshots. You’ll remember that you can see the cobblestone pattern in the Call of Duty 2 screens far beyond where the ATI image blurs them into flat ground, but this comes at a steep price. NVIDIA’s optimizations create the shimmering effect we saw in the Battlefield 2 video, which can range from unnoticeable to distracting, depending on the game, the scene, and how sensitive you are to it. Also, the optimizations produce a sharper point of delineation where the card switches from low detail to high detail textures, creating clear steps of detail change relative to the smooth transition of ATI’s upcoming hardware. ATI’s own optimizations aren’t without fault either, as some users have reported shimmering with ATI’s latest cards as well, but as you can see in the videos, it isn’t nearly as pronounced, even in our scenario outlined with Battlefield 2.

Of course, when you’re playing a game, whether it’s something slow-paced like World of WarCraft, or a fast-paced shooter like Half-Life 2, it’s up to you to decide what matters most. Are you going to notice the NVIDIA optimizations? Is turning them off going to make it better for you? Are you going to prefer ATI’s generally smoother 6xAA or the better boldness and contrast of NVIDIA’s 4x technique? Or, let’s be honest, with differences so small, are you going to go for the card that gives you the best value? Only you can answer the questions for yourself, we just give you the results of our tests to help in your choice.

Finally, a warning and a caveat: many of the images we have shown, and the ones most readers focus on are the cropped versions with commentary. It’s easy to focus in those on that tiny little portion of the screen, especially when we increase the magnfication to help explain what we see. Remember, this is not what you see on the screen. You see the whole screen, you see it in motion, you don’t see it magnified. Look at the cropped cutouts, enjoy the detail, and then go back to take a look at the full version image so you don’t miss the forest for the trees. The little details only add up to create the final picture, they don’t define it. We should also add that judging image quality is a much more subjective field than judging performance. Again, look at the screenshots, watch the videos, and then decide for yourself which card delivers the best combination for your eyes.

We’re considering adding a second part to this article. If you have any feedback/suggestions or things you’d like to see, let us know in the news comments!

爱问(iAsk.com)



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