OCR and PC Architecture

So just how important is your PC hardware when looking to use OCR Software?  Many of the desktop products do not take advantage of multi-core CPUs, and can have laggard performance numbers when it comes to Optical Character Recognition, Intelligent Character Recognition and Optical Mark Recognition.  Currently, playing with PSI:Capture, which offers a number of OCR options, and they have single, dual and quad core enablement in their licensing.  Dual core runs about 1.7 times the speed, and quad core gives a 2.7x improvement.