How much RAM does the Lenovo T420s support?

The T420s supports up to 8GB of memory across 2 slot(s), up to 4GB per slot.

What storage drives fit the Lenovo T420s?

Compatible drive types: SATA 2.5" Hard Drive, SATA 2.5" SSD.

Your system

Lenovo T420sStorage Upgrades

Change system Auto-detect

8 guaranteed-fit options

Internal drives

Matched to this machine's drive bays and slots.

SATA 2.5" SSD

This option is out of stock.

The drive bay size is inferred from the system's reported storage interface.
Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.

SATA 2.5" Hard Drive

This option is out of stock.

The drive bay size is inferred from the system's reported storage interface.
Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.

System specifications for Lenovo T420s

Specifications reported for the Lenovo T420s.

Memory type: DDR3
Memory slots: 2
Maximum memory: 8GB
Max per slot: 4GB
Rated speed: 1333 MT/s
Chipset: Intel® QM67 Express
Processor: i7-2620M

Software

Free tools from Seifelden — no purchase needed.

Seifelden Upgrade AssistantFree

Checks the drivers on your Lenovo T420s, installs the safe updates Windows offers, guides the rest to the official download — and confirms exactly which of the upgrades above your machine has room for.

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Your system

Lenovo T420sStorage Upgrades

Change system Auto-detect

8 guaranteed-fit options

Internal drives

Matched to this machine's drive bays and slots.

SATA 2.5" SSD

This option is out of stock.

The drive bay size is inferred from the system's reported storage interface.
Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.

SATA 2.5" Hard Drive

This option is out of stock.

The drive bay size is inferred from the system's reported storage interface.
Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.

System specifications for Lenovo T420s

Specifications reported for the Lenovo T420s.

Memory type: DDR3
Memory slots: 2
Maximum memory: 8GB
Max per slot: 4GB
Rated speed: 1333 MT/s
Chipset: Intel® QM67 Express
Processor: i7-2620M

Software

Free tools from Seifelden — no purchase needed.

Seifelden Upgrade AssistantFree

Lenovo T420sStorage Upgrades

Choose your upgrade

Internal drives

SATA 2.5" SSD

SATA 2.5" Hard Drive

System specifications for Lenovo T420s

Software

Lenovo T420sStorage Upgrades

Choose your upgrade

Internal drives

SATA 2.5" SSD

SATA 2.5" Hard Drive

System specifications for Lenovo T420s

Software