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DisplayLenovo ThinkPad T420s 417429U 
Screen Size14.00 "
Display Screen TypeActive Matrix TFT Color LCD
Aspect Ratio16:9
Screen ModeWSXGA
Screen Resolution1600 x 900
Backlight TechnologyLED
Graphics Controller ManufacturerIntel
Graphics Controller ModelGMA HD 3000
Graphics Memory TechnologyDDR3 SDRAM
Graphics Memory AccessibilityShared
Hard DriveLenovo ThinkPad T420s 417429U
Storage Size320 GB
Hard Drive InterfaceSerial ATA/300
Hard Drive RPM7200
Optical Drive TypeDVD-Writer
MemoryLenovo ThinkPad T420s 417429U
Memory Card SupportedMultiMediaCard (MMC), Secure Digital (SD) Card, Secure Digital High Capacity (SDHC), Secure Digital Extended Capacity (SDXC)
Standard Memory4 GB
Maximum Memory8 GB
Memory TechnologyDDR3 SDRAM
Memory StandardDDR3-1333/PC3-10600
Number of Total Memory Slots2
Memory Card ReaderYes
NetworkLenovo ThinkPad T420s 417429U
Wireless LANYes
Wireless LAN ManufacturerIntel
Wireless LAN ModelCentrino Advanced-N 6205
Wireless LAN StandardIEEE 802.11n
Ethernet TechnologyGigabit Ethernet
BluetoothYes
Bluetooth StandardBluetooth 3.0
DimensionsLenovo ThinkPad T420s 417429U
Height1.0"
Width13.5"
Depth9.1"
Weight (Approximate)58.88 oz
Detailed SpecsLenovo ThinkPad T420s 417429U
WebcamNo
MicrophoneYes
Finger Print ReaderYes
ProcessorLenovo ThinkPad T420s 417429U
Processor ManufacturerIntel
Processor TypeCore i5
Processor Modeli5-2520M
Processor Speed2.50 GHz
Processor CoreDual-core (2 Core)
Cache3 MB
vPro TechnologyYes
Chipset ManufacturerIntel
Chipset ModelQM67 Express
SoftwareLenovo ThinkPad T420s 417429U
Operating SystemWindows 7 Professional
Operating System Architecture64-bit
Input DevicesLenovo ThinkPad T420s 417429U
Pointing Device TypeTouchPad, Trackpoint
I/O ExpansionsLenovo ThinkPad T420s 417429U
Expansion Slot TypeExpressCard/34
BatteryLenovo ThinkPad T420s 417429U
Battery ChemistryLithium Ion (Li-Ion)
Maximum Battery Run Time5.50 Hour
InterfacesLenovo ThinkPad T420s 417429U
Total Number of USB Ports4
Number of USB 2.0 Ports3
Number of USB 3.0 Ports1
VGAYes
DisplayPortYes