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Operating System LENOVO ThinkPad T420 4177A59Lenovo ThinkPad T420 4177A59 
OS installedWindows 7 Professional
OS architecture64-bit
Processor LENOVO ThinkPad T420 4177A59Lenovo ThinkPad T420 4177A59
Processor family2nd gen Intel Core i5
Processor seriesIntel Core i5-2500 Mobile series
Processor socketSocket 988
Processor modeli5-2520M
Processor cores2
Processor threads4
Processor frequency2.5 GHz
Processor boost frequency3.2 GHz
Processor operating modes64-bit
Processor cache3 MB
Processor cache typeSmart Cache
Memory LENOVO ThinkPad T420 4177A59Lenovo ThinkPad T420 4177A59
Internal memory4 GB
Max. internal memory8 GB
Max. internal memory (64-bit)8 GB
Internal memory typeDDR3-SDRAM
Memory slots2x SO-DIMM
Memory clock speed1333 MHz
Hard Drive & Optical Drive LENOVO ThinkPad T420 4177A59Lenovo ThinkPad T420 4177A59
HDD capacity500 GB
HDD interfaceSerial ATA
HDD size2.5"
HDD speed7200 RPM
Storage mediaHDD
Number of HDDs1
Total storage capacity500 GB
Card reader integratedYes
Compatible memory cardsMMC,SD,SDHC,SDXC
Display & Graphics LENOVO ThinkPad T420 4177A59Lenovo ThinkPad T420 4177A59
HD typeHD
Display diagonal14"
Display resolution1600 x 900 pixels
Display brightness230 cd/m?
Aspect ratio16/9
LED backlightYes
TouchscreenNo
Discrete graphics adapterYes
Discrete graphics adapter modelNVIDIA NVS 4200M
Graphics adapter modelIntel HD Graphics 3000
Graphics adapter familyIntel HD Graphics
Graphics adapter dynamic frequency (max)1300 MHz
Graphics adapter base frequency650 MHz
Graphics adapterYes
Built-in Devices LENOVO ThinkPad T420 4177A59Lenovo ThinkPad T420 4177A59
Front cameraYes
Front camera resolution1280 x 720 pixels
Interfaces LENOVO ThinkPad T420 4177A59Lenovo ThinkPad T420 4177A59
Cable lock slotYes
CardBus PCMCIA slot typeNo
Charging port typeDC-in jack
Docking connectorNo
DVI portNo
Ethernet LAN (RJ-45) ports1
ExpressCard slotYes
Headphone outputs1
S/PDIF out portNo
SmartCard slotNo
Total Number eSATA/USB 2.0 ports1
USB 2.0 ports3
VGA (D-Sub) ports1
Input Devices LENOVO ThinkPad T420 4177A59Lenovo ThinkPad T420 4177A59
Pointing deviceThinkPad UltraNav
Audio LENOVO ThinkPad T420 4177A59Lenovo ThinkPad T420 4177A59
Audio systemHD
MicrophoneYes
Number of speakers2
Battery LENOVO ThinkPad T420 4177A59Lenovo ThinkPad T420 4177A59
Battery life (max)9 h
Battery technologyLithium-Ion (Li-Ion)
Number of battery cells6
Physical Characteristics LENOVO ThinkPad T420 4177A59Lenovo ThinkPad T420 4177A59
Product typeNotebook
Product colourBlack
Depth229.8 mm
Height (front)2.99 cm
Height (rear)3.04 cm
Width340 mm
Weight2.24 kg