GeForce GT 525M
"Thanks to an NVIDIA GeForce GT525M graphics card and 1GB of video memory, the Inspiron 17R produced a solid score of 7,993 on 3DMark06, blowing past the VAIO EC's ATI Mobility Radeon HD 5470 GPU by 3,881 points."
"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)."