That's a huge difference alright, if you are rendering a movie, compiling, crunching numbers or doing something where it would actually make a perceptible difference. But playing a game? 150 fps or 210fps your eye still tops out at 45fps.
That phenom is 80 more watts of power, or more if it...
4850e @ 2750 mhz, stock voltage & cooling in a foxconn a74mx-k with ati 4350 @ 550 mhz and 2gb sys mem @ 395 mhz (790 ddr) - rock solid stable and runs cool & quiet. Performance testing shows that the GPU is the gaiming bottle neck.
Total cost of system about $160, i.e. $20 less than the cost...