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DisplayLenovo ThinkPad T420s (4173-W2W) 
Screen Size14.00 "
Display Screen TypeActive Matrix TFT Color LCD
Aspect Ratio16:9
Screen ModeHD
Screen Resolution1600 x 900
Backlight TechnologyLED
Switchable GraphicsYes
Graphics Controller ManufacturerNVIDIA, Intel
Graphics Controller ModelHD 3000
Graphics Memory CapacityUp to 1 GB
Graphics Memory TechnologyDDR3 SDRAM
Graphics Memory AccessibilityDedicated, Shared
Hard DriveLenovo ThinkPad T420s (4173-W2W)
Storage Size320 GB
Hard Drive InterfaceSerial ATA/300
Hard Drive RPM7200
Optical Drive TypeDVD-Writer
MemoryLenovo ThinkPad T420s (4173-W2W)
Memory Card SupportedMultiMediaCard (MMC), Secure Digital (SD) Card, Secure Digital High Capacity (SDHC), Secure Digital Extended Capacity (SDXC)
Standard Memory8 GB
Maximum Memory8 GB
Memory TechnologyDDR3 SDRAM
Memory StandardDDR3-1333/PC3-10600
Number of Total Memory Slots2
Memory Card ReaderYes
NetworkLenovo ThinkPad T420s (4173-W2W)
Wireless LANYes
Wireless LAN ManufacturerIntel
Wireless LAN ModelCentrino Advanced-N 6205
Wireless LAN StandardIEEE 802.11a/b/g/n
Ethernet TechnologyGigabit Ethernet
BluetoothYes
Bluetooth StandardBluetooth 3.0
DimensionsLenovo ThinkPad T420s (4173-W2W)
Height1.0"
Width13.5"
Depth9.1"
Weight (Approximate)58.88 oz
ColorBlack
Detailed SpecsLenovo ThinkPad T420s (4173-W2W)
WebcamYes
MicrophoneYes
Finger Print ReaderYes
SpeakersYes
ProcessorLenovo ThinkPad T420s (4173-W2W)
Processor ManufacturerIntel
Processor TypeCore i7
Processor Modeli7-2620M
Processor Speed2.70 GHz
Processor CoreDual-core (2 Core)
Cache4 MB
Chipset ManufacturerIntel
Chipset ModelQM67 Express
SoftwareLenovo ThinkPad T420s (4173-W2W)
Operating SystemWindows 7 Home Premium
Operating System Architecture64-bit
Input DevicesLenovo ThinkPad T420s (4173-W2W)
Pointing Device TypeTouchPad, Trackpoint
TouchPad FeaturesMulti-touch Gesture
I/O ExpansionsLenovo ThinkPad T420s (4173-W2W)
Expansion Slot TypeExpressCard/34
BatteryLenovo ThinkPad T420s (4173-W2W)
Battery ChemistryLithium Ion (Li-Ion)
Maximum Battery Run Time5.50 Hour
InterfacesLenovo ThinkPad T420s (4173-W2W)
Total Number of USB Ports3
Number of USB 2.0 Ports2
Number of USB 3.0 Ports1
VGAYes
Audio Line OutYes
DisplayPortYes