Dell OptiPlex 7050 SFF Upgrade Guide: RAM, SSD and CPU

Lifecycle and support

A current model: sold new and supported.

Dates not listed haven't been published by the manufacturer or a reliable third party.

RAM: up to 64 GB in four DIMM slots

The 7050 SFF has four DIMM slots that take DDR4 UDIMMs. These are full-size desktop modules, not the shorter SO-DIMMs used in laptops. Dell lists 4, 8 or 16 GB modules, with a minimum of 4 GB and a maximum of 64 GB (four 16 GB modules). Nothing suggests any memory is soldered to the board, so all of it sits in the four slots.

Dell lists the memory speed as 2400 MHz, but with a 6th-generation processor 2400 MHz modules run at 2133 MHz. With a 7th-generation CPU they run at 2400 MHz. An older copy of the manual words this differently (2133 MHz / 2400 MHz, with 2133 MHz applying only to 6th-gen processors), but both versions agree on the result.

For best performance, install modules in pairs so the system can run dual-channel. Dell's manual doesn't mention ECC or registered memory, so stick to standard unbuffered, non-ECC DIMMs.

Buying tips

• Buy DDR4 desktop UDIMMs, not SO-DIMMs.
• Choose 4, 8 or 16 GB modules, the sizes Dell lists.
• Buy matched pairs, such as 2 × 8 GB, for dual-channel.
• On a 6th-gen CPU, faster-than-2133 MHz modules gain nothing.
• Avoid ECC or registered modules; Dell doesn't list them.

Storage: M.2 NVMe slot plus SATA drive bays

There are three places for storage. The drive bay takes either one 3.5" drive or two 2.5" drives; these are alternatives, so you can't fit both layouts at once. The board has three SATA connectors (SATA 0 to 2), and the optional slim optical drive uses one of them and shares drive-bay space. There is also one M.2 slot, which Dell describes as a PCIe SSD slot. It takes a 2280-length module, and a third-party source puts it at PCIe 3.0 x4, up to roughly 4 GB/s. For a faster SSD, an NVMe drive in this slot is the straightforward choice.

Some sources suggest M.2 SATA drives might work, but Dell's manual lists only M.2 PCIe SSDs and one source warns that some M.2 connectors don't accept SATA SSDs. Treat M.2 SATA as unconfirmed and buy NVMe.

Two things to check first. Some units ship with an Intel Optane module (16 or 32 GB) in the M.2 slot, which is the only one, so look at what your unit already has. Also, Dell's storage page says RAID 0 and RAID 1 are not supported. Dell doesn't state a maximum drive capacity or a 2.5" drive thickness limit, so check the owner's manual if you're unsure.

Buying tips

• For the fastest upgrade, buy an M.2 2280 NVMe SSD.
• Don't buy an M.2 SATA SSD; compatibility isn't confirmed.
• A 2.5" SATA SSD is a simple option for the drive bays.
• Check whether your unit already has an Optane module or M.2 drive before buying.
• Don't plan on a RAID setup with two drives.

CPU: Dell's listed 6th and 7th-gen Core parts

Dell lists these processors for the 7050 SFF. 6th gen: Core i3-6100, i5-6400, i5-6500, i5-6600 and i7-6700. 7th gen: Core i3-7100, i3-7300, i5-7400, i5-7500, i5-7600 and i7-7700. All are 65 W, except the i3-7300 at 51 W, so 65 W is the highest Dell lists.

Dell's documents don't name the socket or say outright that the processor is removable, though the manual shows a processor connector. These CPUs are desktop parts that use LGA1151. Dell doesn't establish support beyond the models above, so stick to that list and confirm compatibility before buying.

Moving from a 6th-gen to a 7th-gen chip may also lift RAM speed from 2133 to 2400 MHz and is required if you want to use an Optane module. Whether a BIOS update is needed for a newer chip isn't covered in Dell's documents, so check Dell's support page for your unit.

Buying tips

• Choose only from the models Dell lists.
• Stay at or under 65 W.
• Check which generation your unit has now and what your target chip is.
• Confirm the socket and removability on your own unit before ordering.

How to upgrade

Before you start

• Check which CPU generation (6th or 7th) your unit has, since it affects RAM speed and Optane support.
• Open the case and see what's installed: optical drive, card reader, Optane module or M.2 drive.
• Back up your important files before changing storage or the CPU.
• Have the owner's manual to hand for exact disassembly instructions.
• If you want a graphics card, note the 180 W proprietary power supply and small chassis allow only low-profile, low-power cards.

Steps

1. Back up your data
   Copy important files to an external drive or cloud storage, especially if you're replacing or cloning a drive.
2. Power off and unplug
   Shut the PC down fully, then unplug the power cord and any other cables. Hold the power button for a few seconds to discharge leftover power.
3. Ground yourself
   Touch bare metal on the chassis or use an anti-static wrist strap before handling parts. Hold components by their edges.
4. Open the case
   Remove the cover as described in the owner's manual for the 7050 Small Form Factor. Follow the manual for any latches, screws or drive-bay hardware.
5. Install the new part
   For RAM, fit matched DDR4 UDIMMs in pairs. For storage, fit the M.2 NVMe SSD in the M.2 slot, or mount a 2.5" or 3.5" drive in the bay and connect it to a SATA port. For a CPU, follow the manual's processor procedure and use only a listed model.
6. Close the case and reconnect
   Replace the cover, reconnect the cables and power on.
7. Check that the system sees the part
   Enter the BIOS/firmware setup at startup and confirm the new memory, drive or processor is detected. A new blank drive will also need an operating system installed or a cloned image.

Good to know

• Dell's documents don't name the CPU socket or explicitly say the processor is removable; these CPUs are generally LGA1151 desktop parts. Verify before buying.
• Support for processors beyond Dell's listed models is not established.
• M.2 SATA drive support is unconfirmed; Dell lists only M.2 PCIe SSDs.
• The PCIe 3.0 x4 figure for the M.2 slot comes from a third-party source, not Dell's manual.
• Dell doesn't state a maximum drive capacity or a 2.5" drive thickness limit.
• Configurations vary by CPU generation, optical drive, card reader, Optane module and M.2 drive, so check your specific unit.

Frequently asked questions

How much RAM can the Dell OptiPlex 7050 SFF take?

Up to 64 GB, using four 16 GB DDR4 UDIMMs. Dell lists a minimum of 4 GB and module sizes of 4, 8 or 16 GB.

What speed of RAM does the OptiPlex 7050 SFF use?

Dell lists 2400 MHz, but with a 6th-generation processor the memory runs at 2133 MHz. 7th-gen CPUs run it at 2400 MHz.

Does the OptiPlex 7050 SFF support NVMe SSDs?

Yes. It has one M.2 slot that Dell lists as a PCIe SSD slot, taking 2280-length modules. M.2 SATA drives are unconfirmed, so choose NVMe.

Can I use RAID in the OptiPlex 7050 SFF?

Dell's storage page says RAID 0 and RAID 1 are not supported, so don't plan on it. An older copy of the manual leaves this line out.

What CPUs does the OptiPlex 7050 SFF support?

Dell lists 6th-gen i3-6100, i5-6400/6500/6600 and i7-6700, and 7th-gen i3-7100/7300, i5-7400/7500/7600 and i7-7700. Dell doesn't establish support for anything beyond those.

Can I add a graphics card to the OptiPlex 7050 SFF?

Only a low-profile, low-power card is realistic. The case is small and the power supply is a proprietary 180 W unit.

Official documents and references

• Dell OptiPlex 7050 SFF: memory specifications
  Slot count, module sizes and memory speed
• Dell OptiPlex 7050 SFF: storage specifications
  Drive bay options and RAID note
• Dell OptiPlex 7050 SFF: processor specifications
  List of supported Core processors
• Dell OptiPlex 7050 SFF: product specifications
  Optane module and M.2 details
• Dell OptiPlex 7050 SFF: Intel Optane memory requirements
  CPU, driver and Windows requirements for Optane
• PDF OptiPlex 7050 Small Form Factor Owner's Manual (PDF)
  Board layout and disassembly guidance
• PDF OptiPlex 7050 manual, earlier copy (PDF)
  Memory speed wording and power supply rating
• Hardware Corner: Dell OptiPlex 7050 SFF
  Third-party notes on M.2, SATA ports and GPU limits