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Just Cause 2

Just Cause 2 is one more game that can be used to showcase the benefits of Nvidia’s SLI technology, even though at high-quality and resource-consuming settings only. For example, the third card adds 8-26% to the 2-way configuration’s speed at 1920x1080 without antialiasing but the numbers grow up to 33-50% when we switch to 2560x1440. So, SLI works well and the game is playable with comfort on the 2- and 3-way SLI setups.

The Nvidia GeForce GTX 680 is equal to the AMD Radeon HD 7970 GHz Edition here, so AMD seems to have caught up with its archrival by releasing the accelerated HD 7970 model. We can also note that the pre-overclocked GTX 670 from Zotac is just as fast as the two mentioned flagship cards.

Aliens vs. Predator (2010)

The multi-GPU configurations are both good in Aliens vs. Predator (2010) except for the resolution of 2560x1440 pixels with 4x antialiasing. The game is known to need over 1.5 gigabytes of graphics memory at such settings and, even though the GeForce GTX 670 comes with 2 gigabytes on board, it may lack memory to show its best in a SLI setup. That’s the only explanation we can find for the low results.

The Nvidia GeForce GTX 680 is inferior to the AMD Radeon HD 7970 GHz Edition in this game, but this might have been expected since the GTX 680 was slower than the original version of the HD 7970 card, too. The Zotac GeForce GTX 670 AMP! Edition is just as fast as the GeForce GTX 680, again.

Lost Planet 2

The efficiency of Nvidia’s SLI technology depends on the graphics load in this test. The second and third graphics cards provide more benefits at higher settings. On the other hand, there is no real point in building a SLI configuration to play Lost Planet 2 because this game runs perfectly well even on a single GeForce GTX 670.

The AMD Radeon HD 7970 GHz Edition is closer to the GTX 680 than the original HD 7970, yet cannot overtake it. The pre-overclocked GTX 670 from Zotac is in between the reference GTX 670 and GTX 680.

StarCraft II: Wings of Liberty

As you can see in the diagram, this game isn’t compatible with SLI technology, just as it’s not compatible with the Radeons when antialiasing is turned on.

Sid Meier’s Civilization V

The 2-way SLI configuration is 86 to 105% ahead of the single card in Sid Meier’s Civilization V, which is a record-breaking result in this test session. The third card isn’t that useful because the 3-way SLI configuration can only add 20-30% to the frame rate.

The AMD Radeon HD 7970 GHz Edition is ahead of both the GeForce GTX 680 and the pre-overclocked card from Zotac.

Tom Clancy’s H.A.W.X. 2

The third GeForce GTX 670 is even harmful in Tom Clancy’s H.A.W.X. 2 because it lowers the frame rate rather than increases it. As opposed to it, the 2-way SLI is 69-92% ahead of the single GTX 670.

The high clock rates help the Radeon HD 7970 GHz Edition to catch up with the GeForce GTX 680. The Zotac is just as fast as the two flagship models.

 
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