X3: Terran Conflict:

X³: Terran Conflict is a brand new, stand-alone game set in the universe of X³. It is the culmination of the X trilogy, with a grand finale that takes us all the way back to Earth's own solar system. Gamers can take on the roles of different characters in the X universe, or of a Terran military pilot, and experience a multitude of stories in the largest X universe ever featured - for X³: Terran Conflict will offer more missions than any other X game before.

For the all testing, the settings were completely maxed out, running at 2560x1600 at max AA and AF:

Video Settings During Benchmark:
Screen Resolution: 2560 x 1600 * [32], full screen
Using Shader Profile: 3.0
Antialias Mode: 8x
Anisotropic Mode: 16x

Graphics & Shader Settings:
Texture Quality: high
Shader Quality: high
High Quality Bumpmaps: enabled
Environment Mapping: enabled
Glow Filter: enabled
Ship Color Variations: enabled
More Dynamic Lights: enabled
Used Vertexsize: 28 bytes

In the X3 test, the HD4870X2 beat the HD5870 in all four tests, by 0.6%, 3.5%, 19.5% and 29.35% respectively.  This is very surprising considering the HD5870's advantage in clock speeds, and being a native single chip.  Looks like those things we hear about Crossfire scaling may just be dead wrong. 

Intro Card Layout Test Setup and Methodology 3DMark Unigine S.T.A.L.K.E.R: Clear Sky X3: Terran Conflict Crysis: Warhead Overclocking Conclusion