"The 15z also has the graphics chops to take on the most intensive 3D games, thanks to the discrete Nvidia GeForce GT 525M. It cranked out above-average 3DMark 06 (8,610) scores and very good frame rates in Lost Planet 2 (36.4 frames per second, or fps), both at 1,024-by-768 resolution and medium detail settings. Though it wasn't as impressive as the XPS 15 (9,787 in 3DMark 06, 38.2fps in Lost Planet 2) and Apple MacBook Pro 15-inch (10,878 in 3DMark 06, 65.7fps in Lost Planet 2), the 15z can hold its own as a gaming laptop. During non-gaming-related tasks, the discrete graphics chip is automatically disabled by an Nvidia feature called Optimus, which lets the Intel integrated graphics take over to optimize battery life."
"The 15z lasted 6 hours 22 minutes in MobileMark 2007, ahead of the Apple MacBook Pro 15-inch (4:40), HP dv6-6070us (6:16), and Samsung RC512-S02 (5:35). It even outlasted the XPS 15, which ran for 6 hours 58 minutes on an even bigger battery (92Wh)."