Windows 7 Home Premium x64
Intel Core 2 Duo CPU E6750 @2.66Ghz (OC'd to 2.72GHz, first OC for me)
Asus P5E-VM HDMI mobo
6 gb Ram (2gb Patriot DDR2-6400, 4gb Ballistix DDR2-6400)
GeForce 9500 GT (1gb DDR2)
80gb Maxtor HDD (installing a 1tb Seagate Constellation ES tomorrow)
My CPU usage when using Flash Player ranges from 50-100%. I can't have more than one 1 other tab open. The culprit is Flash Player, as well as plugin container for firefox or Chrome. I haven't tried IE, but thats because I hate the way it runs and looks.