3  "W7 won't make your computer run any faster. And if you are upgrading from XP, it might run slightly slower, just as with Vista."

 2  "Windows 7 continues Vista's piggish ways with regard to RAM consumption and CPU utilization. Like its notorious predecessor Vista, Windows 7 consumes significantly more RAM than Windows XP."

 1  "Overall, Windows 7's performance improvement over Windows Vista is slight ... Windows 7 was roughly 3.6 percent faster than Windows Vista."