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Product comparison · 2 laptops

Lenovo T420s + 45N6679 vs Lenovo T520 + 45N6678

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  • 124specifications compared
  • 30differ
  • 94identical
  • 20known for one product only

Key differences

  • Display diagonal
    • 35.6 cm (14")
    • 39.6 cm (15.6")
  • Display resolution
    • 1600 x 900 pixels
    • 1366 x 768 pixels
  • Display brightness
    • 250 cd/m²
    • 220 cd/m²
  • Contrast ratio (typical)
    • 300:1
    • 500:1
  • Processor family
    • Intel® Core™ i7
    • Intel® Core™ i5
  • Processor generation
    • 2nd gen Intel® Core™ i7
    • 2nd gen Intel® Core™ i5
  • Processor model
    • i7-2620M
    • i5-2410M
  • Processor boost frequency
    • 3.4 GHz
    • 2.9 GHz

Side by side

Differences highlightedShow differences only
144 specifications
A

Lenovo

T420s + 45N6679View product
B

Lenovo

T520 + 45N6678View product
Display4 differ
Display diagonalDiffers35.6 cm (14")39.6 cm (15.6")
Display resolutionDiffers1600 x 900 pixels1366 x 768 pixels
Display brightnessDiffers250 cd/m²220 cd/m²
Contrast ratio (typical)Differs300:1500:1
HD typeKnown for oneHD+
Processor9 differ
Processor familyDiffersIntel® Core™ i7Intel® Core™ i5
Processor generationDiffers2nd gen Intel® Core™ i72nd gen Intel® Core™ i5
Processor modelDiffersi7-2620Mi5-2410M
Processor boost frequencyDiffers3.4 GHz2.9 GHz
Processor frequencyDiffers2.7 GHz2.3 GHz
Processor cacheDiffers4 MB3 MB
Processor seriesDiffersIntel Core i7-2600 Mobile SeriesIntel Core i5-2400 Mobile Series
PCI Express configurationsDiffers1x16, 2x8, 1x8+2x41x8, 1x16, 2x4, 2x8
CPU multiplier (bus/core ratio)Differs2723
Memoryidentical
Memory clock speedKnown for one1333 MHz
Memory layout (slots x size)Known for one2 x 2 GB
Storage1 differ
Total storage capacityDiffers160 GB320 GB
Number of HDDs installedKnown for one1
HDD interfaceKnown for oneSATA
HDD speedKnown for one7200 RPM
SSD capacityKnown for one160 GB
SSD interfaceKnown for oneSATA
Graphics3 differ
Discrete graphics card modelDiffersNVIDIA® NVS™ 4200MIntel® HD Graphics 3000
Graphics card familyDiffersNVIDIAIntel
On-board graphics card dynamic frequency (max)Differs1300 MHz1200 MHz
Networkidentical
Mobile network connectionKnown for oneYes
Mobile network generationKnown for one3G
Bluetooth versionKnown for one3.0+HS
Ports & interfaces1 differ
USB 2.0 ports quantityDiffers24
Firewire (IEEE 1394) portsKnown for one1
Modem (RJ-11) portsKnown for one1
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityKnown for one1
Processor special features6 differ
Intel Trusted Execution TechnologyDiffersYesNo
Intel Virtualization Technology for Directed I/O (VT-d)DiffersYesNo
Intel® AES New Instructions (Intel® AES-NI)DiffersYesNo
Intel® Insider™DiffersYesNo
Intel® Smart CacheKnown for oneYes
Processor ARK IDDiffers5223152224
Processor package sizeDiffers37.5 x 37.5 (rPGA988B); 31 x 24 (BGA1023)37.5x37.5 (rPGA988B); 31 x 24 (BGA1023)
CPU configuration (max)Known for one1
Processor codeKnown for oneSR041
Battery1 differ
Battery life (max)Differs5.5 h7.7 h
Weight & dimensions5 differ
WeightDiffers1.67 kg2.51 kg
WidthDiffers343 mm372.8 mm
DepthDiffers230.1 mm245.1 mm
Height (front)Differs2.12 cm3.18 cm
Height (rear)Differs2.6 cm3.56 cm
Other featuresidentical
Internal modemKnown for oneYes
Modem speedKnown for one56 Kbit/s
Supplied AC adapter typeKnown for oneAC

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