How much RAM does the Lenovo ThinkCentre M55e 6491 support?

The ThinkCentre M55e 6491 supports up to 4GB of memory across 2 slot(s), up to 2GB per slot.

What type of memory does the ThinkCentre M55e 6491 use?

It uses DDR2 DIMM memory modules.

Compatible drive types: SATA 2.5" SSD, IDE / PATA 2.5" Drive.

Guaranteed-compatible SSD and hard-drive upgrades for the Lenovo ThinkCentre M55e 6491, matched to its drive bays and slots.

Guaranteed-compatible SSD and hard-drive upgrades for the Lenovo ThinkCentre M55e 6491 — matched to its drive bays and slots.

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.

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.

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Guaranteed-compatible SSD and hard-drive upgrades for the Lenovo ThinkCentre M55e 6491, matched to its drive bays and slots.

Guaranteed-compatible SSD and hard-drive upgrades for the Lenovo ThinkCentre M55e 6491 — matched to its drive bays and slots.

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.

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.