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This game is based on the aging Unreal Engine, but it's stressful enough on a GPU to still make a decent candidate for testing. We turned up all of the game's image quality settings to their peaks and enabled 8X antialiasing, and then we tested in 90-second gameplay chunks.

Our single-GPU configs all struggled with this game, as did our pair of GeForce GTX 560 Ti cards in SLI. Those 560s had the least memory of any cards we tested, at 1GB each. Multi-GPU schemes like SLI and CrossFireX have some memory overhead, and we expect that's what troubled our 560s in this case.

The 6990, meanwhile, goes toe to toe with a thousand-dollar option from Nvidia: a pair of GeForce GTX 580s in SLI. The Nvidia alternative in the same price range as the 6990 would be a pair of GTX 570s, but those are a bit slower. Then again, a couple of 6950s in CrossFireX perform very similarly to the 6990, and flipping the AUSUM switch doesn't get you much here, either.