Just Cause 2
CrossFireX technology is very effective here, our configuration being 96 to 100% faster than the single Radeon HD 7970. There were no visual artifacts, either.
Aliens vs. Predator (2010)
The two Radeon HD 7970s perform superbly in Aliens vs. Predator (2010), too. The performance boost varies from 91 to 98%. Judging by the average frame rates, the single Radeon HD 7970 may be not enough to make this game run smoothly at 2560x1600, so the CrossFireX configuration is indeed useful.
Lost Planet 2
Lost Planet 2 prefers Nvidia-based products, so the CrossFireX configuration is not much faster than the single card: +45-52% at 1920x1080 and +66-72% at 2560x1600.
StarCraft II: Wings of Liberty
The CPU-dependent StarCraft II: Wings of Liberty can only show the benefits of CrossFireX at 2560x1600 where the two Radeon HD 7970s are 83-97% faster than the single card. At 1920x1080 the CrossFireX configuration is limited by the performance of our testbed.
Sid Meier's Civilization V
AMD’s multi-GPU technology shows its best in Sid Meier’s Civilization V, boosting the frame rate twofold. We doubt anyone would consider buying two Radeon HD 7970s just for the sake of playing this strategy, though.
Tom Clancy's H.A.W.X. 2
CrossFireX technology is efficient in this test, too. We get a 95% performance boost compared to the single card.