Frame Rating: GeForce GTX 660 Ti and Radeon HD 7950
The Elder Scrolls V: Skyrim (DirectX 9)
The Empire of Tamriel is on the edge. The High King of Skyrim has been murdered.
Alliances form as claims to the throne are made. In the midst of this conflict, a far more dangerous, ancient evil is awakened. Dragons, long lost to the passages of the Elder Scrolls, have returned to Tamriel.
The future of Skyrim, even the Empire itself, hangs in the balance as they wait for the prophesized Dragonborn to come; a hero born with the power of The Voice, and the only one who can stand amongst the dragons.
Our settings for Skyrim
Here is a video our testing run through, for your reference
As we saw in earlier article, the FRAPS results do match our Frame Rating results with Skyrim - CrossFire and SLI appear to working as expected!
Both single card configurations look pretty good in our frame times plot with the green and black lines pretty thin and tight. Both CrossFire and SLI see some additional frame variance though the CrossFire does have it worse in many cases throughout.
In our minimum FPS percentile graph you can see that the average frame reates for the GTX 660 Ti and HD 7950 are very similar though the SLI combination runs a bit faster than the HD 7950s in CrossFire. As often happens in games that have some CPU bottleneck in them, CrossFire and SLI frame rates drop down closer and closer to the results from the single GPUs until meeting them in the 95th mark or so.
Our ISU (international stutter units) frame variance data shows the GTX 660 Ti single card to have the best results though it, the Radeon HD 7950 and even the GTX 660 Tis in SLI are all pretty close. Only the HD 7950s CrossFire runs higher.
Well things are already different at 2560x1440 with some changes going from the FRAPS results to the observed frame rates of our Frame Rating system.
CrossFire definitely has more problems as we jack up the resolution to a higher level as is evident by the high variance in the large sections of orange, representing frame times. SLI however continues to look pretty strong with only some larger areas of variance towards the end of the run.
With the return of runts to the equation for CrossFire, Skyrim at 2560x1440 doesn't look as good for AMD as it did in previous articles. SLI is still going strong.
AMD's HD 7950s in CrossFire ramp up frame time variance pretty steadily starting at the 30-40th percentile while SLI doesn't see it occur until the 95th+ level.
Again, another instance in which we did not get solid Eyefinity + CrossFire results thanks to dropped frames. SLI GTX 660 Tis scale well though the HD 7950 is clearly the better single card option for multi-display gaming with Skyrim.
I apologize for the lost information here but clearly you can see the HD 7950 single GPU solution is running moderately slower than the GTX 660 Ti cards in SLI but is also outputing frames much more consistently.
The Radeon HD 7950 has a strong showing, likely thanks to the 3GB frame buffer, splitting the difference between the GTX 660 TI and the GTX 660 Tis in SLI.
In this case the SLI GTX 660 Ti cards have the most variacne though we don't get past the 6 ms mark until well into the 95th percentile, which should still result in a very solid game play experience.