How much RAM does the Dell OptiPlex 790 (Desktop) support?

The OptiPlex 790 (Desktop) supports up to 16GB of memory across 4 slot(s), up to 4GB per slot.

What type of memory does the OptiPlex 790 (Desktop) use?

It uses DDR3 DIMM memory modules.

Compatible drive types: SATA 2.5" SSD.

Guaranteed-compatible SSD and hard-drive upgrades for the Dell OptiPlex 790 (Desktop), matched to its drive bays and slots.

Guaranteed-compatible SSD and hard-drive upgrades for the Dell OptiPlex 790 (Desktop) — 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 OptiPlex 790 (Desktop), matched to its drive bays and slots.

Guaranteed-compatible SSD and hard-drive upgrades for the Dell OptiPlex 790 (Desktop) — 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.