While it is heavy, it somehow manages to be not too bulky. The dimensions are 15.2 inches wide by 10 inches deep by 1.5 inches high. Its size and weight can be easily forgiven when you learn how well equipped it is.

Its speedy Intel Core i7-3610QM processor runs at a standard 2.3GHz, but Intel's Max Turbo Frequency technology kicks it up to 3.3GHz when put under strain. The Y580 scored a 108 on our rigorous . This makes it about 8 percent faster than our fully equipped desktop baseline system. Lenovo also provides 8GB of 1600MHz DDR3 RAM. This machine  has plenty of speed and power for any application.

The Y580 also delivered a strong performance in our graphics/gaming benchmarks, thanks to the presence of an Nvidia GeForce GTX 660M GPU.To push the system to the brink, we ran DiRT 3 and Crysis 2 at the display's maximum resolution of 1920 by 1080 pixels, with the games' graphics set on Ultra.

The Y580 pulled 29.2 frames per second on DiRT 3 and 20.5 fps on Crysis 2. While that is barely playable, those are respectable numbers at the Ultra settings. When we dropped the settings down to High, DiRT 3 hit the coveted 60 fps mark (reaching an average of 61.1). Crysis 2 didn't become playable at that setting until we dropped the game's resolution to 800 by 600 pixels (at which point it averaged 80.1 fps).  When we set the graphics quality to Low, the Y580 was able to hit 75.5 frames per second with 1366-by-768 resolution.