Originally Posted by CallsignVega
90% every single time you add a GPU over 1x. IE: 1 GPU-25 FPS, 2 GPU-47 FPS, 3 GPU-68 FPS, 4 GPU-90 FPS. Requires Surround with really good drivers/SLI profile and high demand, like Crysis 3/Farcry 3, but it is possible. The key is to keep GPU utilization really high (killer CPU overclock) like in my vid here:
I suppose if you put it that way.
Scaling is generally referred to as a function of the cost of the GPU vs the amount of increase from the previous one.
25 to 47 is a huge increase percentage, but 68 to 90 is significantly less of an increase for 33% more cost. When it comes to Titans, that 33% is massive, and not very many games scale that well with 3-4 cards, at least with nvidia.
Of course, I understand the allure of having 4 titans. Its absurd, the performance is unbeatable. Even 3 Titans is only overshadowed by 4 Titans. But I wouldn't really say that every additional Titan is 90% increase, because it isn't. Each one might be around 90% if you are simply adding on top of the first one, but:
In your example, 25 to 47 is an increase of 88%. Ideal scaling is 100% increase.
47 to 68 is an increase of 44%. Ideal scaling is 50% increase.
68 to 90 fps is only 32%. Ideal scaling would be 33% increase.
At that point you have to decide if an extra 33% is worth 32% performance, and this is one of the best examples I have ever heard of in 4 way SLI.
If you ask me, of course it is worth it.
Second Titan is 88%.
Third Titan is 84%
Fourth Titan is again 88%.
But I have never seen anyone report it that way, and after doing the math.. I am not sure which one I like more. Probably the first, as it relates to overall cost. Your way, I don't find to be accurate.
4 isn't 90% more performance than 3, nor is 3 90% more than 2.
But, having put it all on paper here... I don't know what people are crying about, the scaling of the Titan looks flat out amazing with your numbers.Edited by Masta Squidge - 7/2/13 at 7:25pm