How much RAM does the Dell OptiPlex 990 MT support?

The OptiPlex 990 MT supports up to 16GB of memory across 4 slot(s), up to 4GB per slot.

What storage drives fit the Dell OptiPlex 990 MT?

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

Your system

Dell OptiPlex 990 MTStorage 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 Dell OptiPlex 990 MT

Specifications reported for the Dell OptiPlex 990 MT.

Memory type: DDR3
Memory slots: 4
Maximum memory: 16GB
Max per slot: 4GB
Rated speed: 1333 MT/s
Chipset: Intel® Q67 Express
Processor: i5-2400

Software

Free tools from Seifelden — no purchase needed.

Seifelden Upgrade AssistantFree

Checks the drivers on your Dell OptiPlex 990 MT, 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

Dell OptiPlex 990 MTStorage 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 Dell OptiPlex 990 MT

Specifications reported for the Dell OptiPlex 990 MT.

Memory type: DDR3
Memory slots: 4
Maximum memory: 16GB
Max per slot: 4GB
Rated speed: 1333 MT/s
Chipset: Intel® Q67 Express
Processor: i5-2400

Software

Free tools from Seifelden — no purchase needed.

Seifelden Upgrade AssistantFree

Dell OptiPlex 990 MTStorage Upgrades

Choose your upgrade

Internal drives

SATA 2.5" SSD

SATA 2.5" Hard Drive

System specifications for Dell OptiPlex 990 MT

Software

Dell OptiPlex 990 MTStorage Upgrades

Choose your upgrade

Internal drives

SATA 2.5" SSD

SATA 2.5" Hard Drive

System specifications for Dell OptiPlex 990 MT

Software