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AMD Radeon HD 6870 & HD 6850 in CrossFireX
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by Rob Williams on October 25, 2010 in AMD-Based GPU

We took a hard look last week at AMD’s Radeon HD 6870 and HD 6850, and in the end, were left impressed. The FPS/$ ratio was superb, as was the feature-set. How do things look when the same cards are tossed into a CrossFireX setup? Well, AMD claims an up to 1.99x gain in certain games, so let’s see how reliable that figure is.

Mafia II

For fans of the original Mafia game, having to wait an incredible eight years for a sequel must’ve been tough. But as we found out in our review, the wait might be forgotten as the game is quite good. It doesn’t feature near as much depth as say, Grand Theft Auto IV, but it does a masterful job of bringing you back to the 1940′s and letting you experience the Mafia lifestyle.

Mafia II

Manual Run-through: Because this game doesn’t allow us to save a game in the middle of a level, we chose to use chapter 7, “In Loving Memory…”, to do our runthrough. That chapter begins us on a street corner with many people around, and from there, we run to our garage, get in our car, and speed out to the street. Our path ultimately leads us to the park, and takes close to two minutes to accomplish.

While Dirt 2 tends to be more Radeon-optimized, Mafia II is GeForce-optimized, and that’s proven here with the GTX 480 creeping up towards the top once again. It manages to surpass the CrossFireX’d HD 6850, but fell far behind the HD 6870 in the same configuration.

Graphics Card
Best Playable
Min FPS
Avg. FPS
AMD HD 6870 1GB (CrossFireX)
2560×1600 – Max Detail, PhysX High, 0xAA
28
82.029
AMD HD 6850 1GB (CrossFireX)
2560×1600 – Max Detail, PhysX High, 0xAA
28
69.177
NVIDIA GTX 480 1536MB (Reference)
2560×1600 – Max Detail, PhysX High, 0xAA
23
61.922
AMD HD 5870 1GB (Sapphire)
2560×1600 – Max Detail, PhysX Medium, 0xAA
39
60.947
AMD HD 6870 1GB (Reference)
2560×1600 – Max Detail, PhysX Medium, 0xAA
33
54.626
NVIDIA GTX 470 1280MB (EVGA)
2560×1600 – Max Detail, PhysX Medium, 0xAA
30
50.955
AMD HD 5850 1GB (ASUS)
2560×1600 – Max Detail, PhysX Medium, 0xAA
27
38.468
NVIDIA GTS 450 1GB (SLI)
2560×1600 – Max Detail, PhysX Off, 0xAA
35
49.230
AMD HD 6850 1GB (Reference)
2560×1600 – Max Detail, PhysX Off, 0xAA
34
44.377
AMD HD 5830 1GB (Reference)
2560×1600 – Max Detail, PhysX Off, 0xAA
33
39.252
NVIDIA GTX 460 1GB (EVGA)
2560×1600 – Max Detail, PhysX Off, 0xAA
27
38.625
AMD HD 5770 1GB (Reference)
2560×1600 – Medium Shadows, Medium Geometry, SSAO Off, 0xAA
30
44.030
NVIDIA GTS 450 1GB (ASUS)
1920×1080 – Max Detail, PhysX Off, 0xAA
38
46.118
AMD HD 5750 1GB (Sapphire)
1920×1080 – Medium Detail, PhysX Off, 0xAA
32
47.660

NVIDIA’s graphics cards might excel at PhysX acceleration, but thanks to the raw power delivered by AMD’s new cards in CrossFireX mode, we can actually max out the game entirely, including PhysX High. I kept AA disabled because the gained performance is more appreciated than non-noticeable smoothed lines.