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Far Cry 3

The thing to note about the Far Cry 3 results is that the Fraps and FCAT numbers should align perfectly, since we were able to use both tools simultaneously with this game. Click through the results from the different GPUs, and you can see how they correspond, generally with a little more variance from Fraps than FCAT. The 7990 is something of an exception to this rule, since it has a lot going on, including latency spikes in Fraps that don't show up in FCAT and multi-GPU jitter visible to both tools. By contrast, the GTX 690 has microstuttering almost completely under control.



Just low FPS numbers alone tell us this scenario is tough going for the 7970 and GTX 680. None of the other metrics are kind to those cards, either. The two top solutions in the latency-focused measurements are the GTX 690 and the Titan. The GTX 690 looks to be faster generally, but it suffers from a much larger hiccup about 40% of the way into the test run, which pushes up its time spent beyond 50 ms. The Titan handles that same speed bump much better.

After that, well, it's complicated. By the numbers, the 7990 appears to split with the 7970; one or the other comes out on top, depending. What you don't see in the numbers, though, is the herky-jerky motion that the 7990 produces, apparently as the result of some kind of CrossFire issue. We noted this problem with dual 7970s in our Titan review months ago, and AMD hasn't fixed it yet. We don't need to slow down the video in order to illustrate this problem. Just have a look at the 7970 versus the 7990 below. We'll start with the 7970:

And now the 7990:

And the GTX 690:

Whatever's wrong with the 7990, the 7970 isn't affected, and neither is the dual-GPU GTX 690.

Does the 7990's second GPU give it an advantage over the 7970? Not in Far Cry 3, not with that awful motion. I'd take a single 7970 over that anytime. The GTX 690, on the other hand, comes out looking pretty solid, definitely better than the GTX 680 or the 7970.