Radeon HD 4870 X2: Four Cards Compared

Crysis v1.21 Very High Quality

Even with very high image quality settings, the power of the overclocked quad-core CPU is nicely transferred into 3D performance. The GeForce 9800 GX2 without anti-aliasing cannot be slowed down, but with activated anti-aliasing, the frame rate starts dropping significantly at 1680x1050 because of the 2 x512 MB graphics memory. The GeForce 9800 GTX+ 512 also shows obvious memory problems at a resolution of 1920x1200 with AA turned on.

With the AMD cards, you can also see a difference between 512 MB and 1 GB of graphics memory. The Radeon HD 4870 in CrossFire shows 6 fps lower performance at 1920x1200 with anti-aliasing than the better-equipped Radeon HD 4870 X2, which has 2 x 1 GB. The Radeon HD 4850 reaches its limit at 1920x1200 with anti-aliasing and overclocking the quad-core CPU (QX@3.67) provides no improvement.

Driver Comparison: Catalyst 8.9 Versus Catalyst 8.10 w/ Radeon HD 4870 X2

In the very high quality setting mode, the results are also within measurement error limits. This is somewhat unusual; Crysis usually shows more variation when using new drivers given that it’s a very graphics-heavy game.

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Crysis Very High in fps12800xAA16800xAA19200xAA12804xAA16804xAA19204xAAOverall
HD 4870 X2 8.10 QX@3.6729.426.325.727.424.423.8157.0
HD 4870 X2 8.9 QX@3.6729.426.626.227.224.523.8157.7
Performance difference in percent0.0-1.1-1.90.7-0.40.0-0.4