Turbo mode is really a saving grace for 750. Without it(3.2Ghz) it is slower in most cases than 965 and even 955. What matters is that most "advanced" desktop users won't use stock settings but will OC their systems to the max(or to the sweet spot for their chip). In this case there is no turbo to help 750 to boost its results since it's already OCed. At this point the difference is in price between AMD or intel rig(board,memory,cooling,crossfire support and scaling abilities).
I'm still to read a good i5/i7 1156 review that covers multi gpu scaling and the see how good (or bad) is the int. PCI-e controller.
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