Your real potential for a bottleneck will lie with the hard drive, but unless you're looking to play new games on ultra settings at 1080p, you shouldn't have any problems. I know this example is a few generations old now, but I've got an i7-2670QM with a GT540M, and neither could be considered a "bottleneck" when used together (except maybe with HD video editing, the 540M can easily run out of video RAM, but that's about it). The only bottleneck in my case was the HD which I replaced with a SSD last year.