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测试方法:
For our benchmark we ran through Crysis 2's "Battery Park" single-player level on a near-finished build of the game, using in-game scripting to keep the benchmark uniform and repeatable.
For our test rig we used an Intel Core i7-960 3.2 GHz CPU, 6GB of DDR3 RAM and Windows 7 64-bit, and utilized the latest 266.58 NVIDIA WHQL GPU drivers.
Unlike the first game, Crysis 2 doesn't have any graphical sliders or checkboxes to enable. Instead, there are three preset modes: Gamer, Advanced, and Hardcore. Gamer is the lowest setting, Advanced is in the medium setting, and Hardcore is the highest. However, there's nothing noticeably “low-res” about the Gamer setting, as Gamer in Crysis 2 looks drastically better than the original Crysis on Low or Medium. Furthermore, Crysis 2 applies a form of shader-based anti-aliasing on all three modes that smoothes out jagged lines far better than prior approaches, without additional unwanted blurring.
As Crysis 2 is still in development Electronic Arts and Crytek have asked that we hold off on posting comparative screenshots between the three detail levels, though generally speaking, on Gamer, you get a very clean looking image without strong High Dynamic Range (HDR) lighting effects. On Advanced and Hardcore, HDR kicks into high-gear and you get wonderfully warm god rays and dynamic lights, and going from Advanced to Hardcore introduces shadows with soft, fading edges and a few other minor effects.
Polygon count is also increased significantly between the modes - in Gamer each scene is comprised of roughly three hundred to four hundred thousand polygons; in Advanced five hundred to six hundred thousand polygons; and in Hardcore up to and above one million polygons.
In general, enabling a higher detail level increases shader quality, water detail, motion blur, particle effects, particle effect density, lighting effects, and texture quality, and on Hardcore, dust effects are richer, giving the battlefield an overall grittier feel.
Now, let's take a look at how Crysis 2 performs across the three detail levels.
Analysis: As you can see from the data, despite being roughly three years old, the popular 8800 GT proved capable of running Gamer settings at 1680x1050, with a respectable average of 43.2 frames per second, though performance did begin to suffer at higher resolutions. While the 8800 GT isn't geared to run the game at 2560x1600 due to its lack of texture memory, we ran the test anyway, and as expected performance suffered, with the frame rate dropping to an unplayable 17.7 frames per second average. It should be noted that we attempted to also measure minimum frame rates in all of our tests, but due to a quirk in CryEngine 3 each result was erroneous. Moving up the GPU ladder, the 260 and 460 ran Gamer settings adequately at 1920x1200, with both generating average frames per second results slightly above 30 at 2560x1600 (34.2 and 35.6 respectively).
Both current and older generation cards handled Gamer settings without difficulty, and the newer 500 series GPUs frequently exceeded 60 frames per second, suggesting that they are really itching to tackle the higher detail levels. With that said, let's examine Advanced.
Analysis: With the detail level increased to Advanced, added lighting effects and improved graphical shaders were introduced to the benchmark, resulting in an average frames per second reduction of 28% across our range of GPUs. The GeForce GTX 260 and 460 produced playable results at 1920x1200, but both proved impractical at 2560x1600, with average frame rates of just 26.8 and 28.5, respectively. The older 8800 GT, on the other hand, can technically play on Advanced at 1680x1050, but its average frame rate of 33 may be too low for comfort.
Compared to the older cards the GTX 500 GPUs handled Advanced with ease at all resolutions, with even the affordably-priced GeForce GTX 560 Ti managing a very playable average FPS of 38.3 at 2560x1600. At the top end the GTX 580 didn't break a sweat, averaging 55.5 fps at 2560x1600. To discover whether the mighty GTX 580 can be challenged let’s examine our Hardcore results…
Analysis: Hardcore didn’t disappoint – by cranking everything to max the mighty GTX 580 was challenged. With that in mind, the 8800 GT was unsurprisingly unable to break the magical 30 frames per second barrier at even the lowest resolution, and at 2560x1600 only recorded a 7.1 frames per second average. The GeForce GTX 260 fared better, just making the cut at 32.3 frames per second at 1680x1050, but was impractical at higher resolutions, producing 27.1 frames per second at 1900x1200 and 17.4 at 2560x1600. The GeForce GTX 460 fared better still, maintaining an average frame rate of 39.6 at 1680x1050, and was also able to break the 30 frames per second barrier at 1920x1200, with an average rate of 32.4. At 2560x1600 the 460 managed just 19.6 frames per second.
In terms of the latest generation GPUs, all but the GTX 560 Ti could legitimately max out Crysis 2 on Hardcore at 2560x1600. At 1680x1050 the 560 Ti recorded a 52.8 frames per second average, and at 1900x1200 a comfortable 42.6. The GTX 570, with its 1.2GB of VRAM, was the first GPU to break 30 frames per second at 2560x1600, though with the average only being 31.4 some may see that figure as too close for comfort. The GTX 580, however, was able to attain an average frame rate of 35.4 thanks to its increased processing power and 1.5GB of VRAM, making the top-end GPU the best performer in our test, unsurprisingly.
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