How much RAM does the Dell Dimension E521N support?

The Dimension E521N supports up to 4GB of memory across 4 slot(s), up to 1GB per slot.

What type of memory does the Dimension E521N use?

It uses DDR2 DIMM memory modules.

Compatible drive types: SATA 2.5" SSD.

Guaranteed-compatible SSD and hard-drive upgrades for the Dell Dimension E521N, matched to its drive bays and slots.

Guaranteed-compatible SSD and hard-drive upgrades for the Dell Dimension E521N — 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.

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Guaranteed-compatible SSD and hard-drive upgrades for the Dell Dimension E521N, matched to its drive bays and slots.

Guaranteed-compatible SSD and hard-drive upgrades for the Dell Dimension E521N — 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.