icore 5 quad-core 2.8 ghz
4gb 1600hmz ddr3 memory
Everything is maxed at 1680 x 1050

The thing that's causing most of the lag at the end of rooftop_runaway_extended is the smoke flares surrounding the helicopter; get rid of those and I'll guarantee you that everyone's fps will shoot up. I would do it but my stupid decomplier isn't working for some reason.