I do not understand what you mean by "fruitful yield."
What are you trying to do? Does AE crash? We need project details to help.
What the others said - we have no clue what you are talking about since you haven't explained what the problem actualyl is.
Sorry for not being clear with the question. (we do not speak English and we're using the google translator). The situation is as follows: The render is taking much longer than on a workstation with more modest setting. For example: 4770 intel CPU and single graphics card without SLI GTX 680 -> 24min rendering. Now our Workstation: Intel 3960X (extreme edition) and two GTX 780 TI graphics cards in SLI mode -> 38mim rendering. Both with the same project.
Maybe it would be incompatibility with the GTX 780 Ti? They together have more CUDA Cores than the GTX 680.
Unless you are using the ray-traced 3d renderer to create 3d objects in AE or certain third-party plugins, After Effects does not use the GPU for rendering. More info here.
And, if you are using the ray-traced 3d renderer to create 3d objects in After Effects, why? There are much better ways of doing 3d in After Effects. This is especially true if you have the latest version of After Effects since it includes a lite version of Cinema 4D which is greatly superior to the ray-traced renderer. However, we do not even know what version of After Effects you have.
In order for us to help you figure out the issues you are having, please follow the link Dave gave you and give us all of the information his link mentions. There are many variables involved in figuring out technical problems, so the more information we have, the better.
One thing that would especially help would be screenshots of the memory and multiprocessing settings in both machines.
Some other particularly useful bits of information would be what is in the composition that you are rendering on these machines. It is the same composition, right? It would help to know what effects you are using, what format and codec any vidoes in your project are using, and what format and codec you are trying to render to.
Just out of curiousity, what is your native language? Google Translator seems to be doing well at translating from it into English.
Rendering time depends on the project and the memory settings on your machine. Many things can slow this down. You need to go through the information in the following articles to optimize your machine. If that does not help then we need to see your memory and multi processing settings and have a full description of your OS, version of AE and project.