How much RAM does the Dell OptiPlex 7400 All In One support?

The OptiPlex 7400 All In One supports up to 64GB of memory across 2 slot(s), up to 32GB per slot.

What type of memory does the OptiPlex 7400 All In One use?

It uses DDR4 SODIMM memory modules.

Guaranteed-compatible DDR4 SODIMM upgrades for the Dell OptiPlex 7400 All In One, in matched-kit options that fill your slots.

Good to know

Maximum capacity per slot is inferred from total capacity ÷ number of slots.
Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.

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Guaranteed-compatible DDR4 SODIMM upgrades for the Dell OptiPlex 7400 All In One, in matched-kit options that fill your slots.

Good to know

Maximum capacity per slot is inferred from total capacity ÷ number of slots.
Compatibility is based on published specifications, not yet confirmed against a manufacturer tool.