Do you think the GPU's can be used in tandem?

[acprkit]

That would be 32 +16 cores, which = 48 cores

I realize Grand Central/Open CL might utilize both in the future, but could both be combined when plugged in for a graphics boost?

 

[Wolfpup]

No. You absolutely can't.

The only POSSIBLE exception might be if Apple's upcoming OS could run one for graphics, and the other running programs. That may not be technically possible though, and for sure you're not going to be running them together for graphics.

Unfortunately the new Macbook Pro is no better than the old one for graphics (aside from being able to switch to a slower GPU to conserve battery life).

 

[alphaod]

That would be 32 +16 cores, which = 48 cores

I realize Grand Central/Open CL might utilize both in the future, but could both be combined when plugged in for a graphics boost?

It doesnt work. The only way SLI will work is if both GPUs are the same model. Like if they were both 9400M GTs.