Kane & Lynch 2
Using a single-core CPU limits graphics card performance in this game, while a dual-core CPU is perfectly fine. Overclocking does not result in any frame rate increase, but CPU utilization goes down.
With anti-aliasing activated (the game only supports 4xAA), 585 MB of graphics memory gets used. You need at least two CPU cores to get the most out of a GeForce GTX 460 in this game.