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Product comparison · 2 laptops

Lenovo T490 + USB-C Dock Gen 2(40AS0090AU) vs Lenovo X1 Carbon + Bag(4X40H75820) & Mouse(4X30M56887)

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  • 130specifications compared
  • 19differ
  • 111identical
  • 29known for one product only

Key differences

The Lenovo T490 + USB-C Dock Gen 2(40AS0090AU) has 8 GB more internal memory than the Lenovo X1 Carbon + Bag(4X40H75820) & Mouse(4X30M56887) (16 GB vs 8 GB). The Lenovo T490 + USB-C Dock Gen 2(40AS0090AU) has 267 MHz more memory clock speed than the Lenovo X1 Carbon + Bag(4X40H75820) & Mouse(4X30M56887) (2400 MHz vs 2133 MHz). The Lenovo T490 + USB-C Dock Gen 2(40AS0090AU) has 40 GB more maximum internal memory than the Lenovo X1 Carbon + Bag(4X40H75820) & Mouse(4X30M56887) (48 GB vs 8 GB). Only the Lenovo T490 + USB-C Dock Gen 2(40AS0090AU) has card reader integrated. Internal memory type: DDR4-SDRAM on the Lenovo T490 + USB-C Dock Gen 2(40AS0090AU), LPDDR3-SDRAM on the Lenovo X1 Carbon + Bag(4X40H75820) & Mouse(4X30M56887).

  • Internal memory
    • 16 GB
    • 8 GB
  • Internal memory type
    • DDR4-SDRAM
    • LPDDR3-SDRAM
  • Memory clock speed
    • 2400 MHz
    • 2133 MHz
  • Memory form factor
    • On-board + SO-DIMM
    • On-board
  • Maximum internal memory
    • 48 GB
    • 8 GB
  • Total storage capacity
    • 256 GB
    • 512 GB
  • Total SSDs capacity
    • 256 GB
    • 512 GB
  • SSD capacity
    • 256 GB
    • 512 GB

Side by side

Differences highlightedShow differences only
159 specifications
A

Lenovo

T490 + USB-C Dock Gen 2(40AS0090AU)View product
B

Lenovo

X1 Carbon + Bag(4X40H75820) & Mouse(4X30M56887)View product
Designidentical
Housing materialKnown for oneCarbon fibre, Magnesium
Memory5 differ
Internal memoryDiffers16 GB8 GB
Internal memory typeDiffersDDR4-SDRAMLPDDR3-SDRAM
Memory clock speedDiffers2400 MHz2133 MHz
Memory form factorDiffersOn-board + SO-DIMMOn-board
Maximum internal memoryDiffers48 GB8 GB
Maximum internal memory (64-bit)Known for one8 GB
Memory slotsKnown for one1x SO-DIMM
Storage4 differ
Total storage capacityDiffers256 GB512 GB
Total SSDs capacityDiffers256 GB512 GB
SSD capacityDiffers256 GB512 GB
Card reader integratedDiffersYesNo
Compatible memory cardsKnown for oneMicroSD (TransFlash)
Graphicsidentical
Discrete graphics cardKnown for oneNo
Discrete graphics card modelKnown for oneNot available
Audio2 differ
Audio chipDiffersRealtek ALC3287Realtek ALC3286
Number of built-in speakersDiffers24
Audio decodersKnown for oneDolby Atmos
Audio systemKnown for oneDolby Audio Premium
Speaker powerKnown for one2 W
Cameraidentical
Privacy cameraKnown for oneYes
Privacy typeKnown for onePrivacy shutter
Network1 differ
Wi-Fi standardsDiffers802.11a, 802.11b, 802.11g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac)802.11a, Wi-Fi 5 (802.11ac), 802.11b, 802.11g, Wi-Fi 4 (802.11n)
Ethernet LANKnown for oneYes
Ethernet LAN data ratesKnown for one10,100,1000 Mbit/s
Ports & interfaces2 differ
USB 3.2 Gen 1 (3.1 Gen 1) Type-C ports quantityDiffers10
USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantityKnown for one0
USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantityDiffers12
USB Type-C DisplayPort Alternate ModeKnown for oneYes
Ethernet LAN (RJ-45) portsKnown for one1
Headphone outputsKnown for one1
Microphone inKnown for oneNo
Docking connectorKnown for oneYes
Softwareidentical
Operating system architectureKnown for one64-bit
Battery3 differ
Battery technologyDiffersLithium Polymer (LiPo)Lithium-Ion (Li-Ion)
Battery capacityDiffers50 Wh51 Wh
Battery life (max)Differs16.11 h18.3 h
Fast chargingKnown for oneYes
Poweridentical
USB Type-C charging portKnown for oneYes
USB Power Delivery (USB PD)Known for oneYes
Securityidentical
Smart card readerKnown for oneNo
Certificatesidentical
Compliance certificatesKnown for oneRoHS
CertificationKnown for oneMIL-STD-810G
Sustainabilityidentical
Sustainability certificatesKnown for oneEPEAT Silver, ENERGY STAR
Weight & dimensions2 differ
WidthDiffers329 mm323 mm
DepthDiffers227 mm217 mm
HeightKnown for one17.9 mm
Optical driveidentical
LightScribeKnown for oneNo

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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