IA currently does not utilize any features of the graphics card so the choice of graphics card is not important.
All of the time consuming algorithms are, however, optimized to take advantage of multiple CPU cores so for many of them it holds that twice as many cores will double the performance. Therefore I would recommend at least 4 and perhaps 8 cores.
I don't really have any experience with the significance of the chip set so I can't give any recommendation there.
For working with big images I will definitely recommend using the 64bit version of Windows and 8GB of RAM, though I guess that all PCs are sold with that today. IA is itself not a 64bit program, but even 32bit software will take advantage of the 64bit Windows because it makes 4GB of memory available to them where the 32bit Windows only leaves 2GB for applications.
> software developer <