How much RAM does the Lenovo ThinkStation D20 4155 support?

The ThinkStation D20 4155 supports up to 48GB of memory across 12 slot(s), up to 4GB per slot.

What storage drives fit the Lenovo ThinkStation D20 4155?

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

Your system

Lenovo ThinkStation D20 4155Storage 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 ThinkStation D20 4155

Specifications reported for the Lenovo ThinkStation D20 4155.

Memory type: DDR3
Memory slots: 12
Maximum memory: 48GB
Max per slot: 4GB
Rated speed: 1333 MT/s
ECC: supported

Software

Free tools from Seifelden — no purchase needed.

Seifelden Upgrade AssistantFree

Checks the drivers on your Lenovo ThinkStation D20 4155, 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 ThinkStation D20 4155Storage 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 ThinkStation D20 4155

Specifications reported for the Lenovo ThinkStation D20 4155.

Memory type: DDR3
Memory slots: 12
Maximum memory: 48GB
Max per slot: 4GB
Rated speed: 1333 MT/s
ECC: supported

Software

Free tools from Seifelden — no purchase needed.

Seifelden Upgrade AssistantFree

Lenovo ThinkStation D20 4155Storage Upgrades

Choose your upgrade

Internal drives

SATA 2.5" SSD

SATA 2.5" Hard Drive

System specifications for Lenovo ThinkStation D20 4155

Software

Lenovo ThinkStation D20 4155Storage Upgrades

Choose your upgrade

Internal drives

SATA 2.5" SSD

SATA 2.5" Hard Drive

System specifications for Lenovo ThinkStation D20 4155

Software