hairycat101 :
immagikman is clearly ticked off at NVIDIA for making the 780a superior (at least in his view). I would be willing to bet that there were some engineering reasons for this. There would not be any marketing reasons for this as most of the market (especially enthusiast market) is buying Intel chips.
I have a speculation about why the 780a might be better than the 780i. First, Nvidia has had a long association with AMD as the prime supplier of chipsets for AMD. This puts Nvidia into a unique position of probably understanding the AMD chips better than almost any other company. Of course, with AMD's aquisition of ATI, this relationship is strained, but its still there for the moment, along with a lot of licensing.
Second, Intel and Nvidia seem to be having problems. Nvidia refused to allow Intel to make its new boards as SLI compatible. I suppose Nvidia wanted to keep its SLI tech to itself, but it put Intel into a bad position, that of only being able to make motherboards with two graphics card capabilities that support its rivel, AMD/ATI. That must grate on Intel pretty bad. In response, Intel might be refusing to allow Nvidia to make the latest and greatest components for Intel's newest tech, so Nvidia's chipsets for Intel could be based on older tech and thus not be as good.
Again, in speculation only, I think Nvidia may be digging its own grave in regards to SLI. It is shutting itself off from Intel and eventually will find itslef shut out from AMD, as AMD's ATI division will develope new tech that Nvidia can't use. Its possible that Nvidia could find itself with no ability to produce new chipsets for either Intel or AMD, and the same for SLI. Then what? Nvidia reduced to making video cards only, thus loosing a large amount of its business? Again, this is only speculation and I could well be wrong.