FeaturesFeaturesProcessor• See the system properties of your computer. You can do this as follows: Click Start, right-click Computer(in Windows XP, My Computer); then from the pull down menu select Properties.Memory• Double data rate 3 (DDR3) synchronous dynamic random access memory– ThinkPad T520: 2 slots– ThinkPad T520i: 2 slots– ThinkPad W520: 4 slotsNote: For ThinkPad W520 with dual-core processor models, two of the four slots are preinstalledwith Dummy DIMM cards. For details, refer to the instructions in “Increasing or replacing memory(W520)” on page 139.Storage device• 2.5-inch (7 mm height or 9.5 mm height) hard disk drive• 2.5-inch (7 mm height) solid state drive• mSATA solid state drive (on some models)DisplayThe color display uses TFT technology:• Size: 15.6 inch (396 mm)• Resolution:– LCD: 1920-by-1080, 1600-by-900, 1366-by-768– External monitor: Up to 2560-by-1600• Brightness control• ThinkLight• Integrated camera (on some models)• Color sensor (on some models)• Built-in microphones (on some models)• Multi-touch panel (on some models)Keyboard• 89-key• UltraNav (TrackPoint and multi-touch touch pad)• Fn key function• ThinkVantage button• Volume control buttons• Speaker mute button• Microphone mute button20 User Guide