680i mobo are not the best for overclocking. that would hold me back from getting it, has a big problem with fsb holes. 750i is probably the better board for overclocking out of those two therefore better for gaming. but in all my opinion would be to scrap both boards and thing about something better. cant recommend one because i dont know what cpu you have but i guess its 775 so i would look for a p45 chipset like the gigabyte p45 ud3r or a biostar p45 mobo.