Do you have the single 750M or SLI? If it's just one, you might have to turn down the settings a little in order to play at max resolution.
It's just one for now, I'll get the 750m ultrabay thing when it's available. It's at high now, which isn't the max. But I assume you mean I'll have to turn it down either way. But when you say, "a little", how much are we talking?