Dell Precision Tower 3420
Desktop, from 2018 13 hardware reports
Memory
Up to 32 GB
4 full-size slots
SSD
1+ M.2
At least 1 M.2 SSD slot
Drives and power
Coming next
Checked from separate sources
Upgradable
Yes. 4 slots, up to 32 GB seen working.
It takes DDR4-2133 full-size sticks (DIMM).
- Slots
- 4 DIMM slots
- Type
- DDR4-2133 288-pin DIMM
- Most seen working
- 32 GB in two or more machines; one machine runs 64 GB
- Firmware says
- 64 GB maximum (often wrong, so we show what machines run)
- SSD slots
- At least 1 M.2 SSD slot listed by the firmware
- How sure
- 13 of 13 reports show this layout
See 8 GB DDR4-2133 DIMM on AmazonOpens an Amazon search for this exact spec.
Worked out from 13 hardware reports of this desktop. Sources and method. Updated 9 Nov 2026.
4 full-size slots
Illustration Questions
Can I upgrade the RAM in the Dell Precision Tower 3420?
Yes. 4 slots, up to 32 GB seen working. It takes DDR4-2133 full-size sticks (DIMM).
What type of RAM does the Dell Precision Tower 3420 use?
DDR4-2133 full-size sticks (DIMM, 288-pin).
How much RAM can the Dell Precision Tower 3420 take?
Machines in the reports run up to 32 GB, and one runs 64 GB. The firmware reports a maximum of 64 GB, a figure that is often wrong.
Does the Dell Precision Tower 3420 have an M.2 SSD slot?
Yes. The firmware lists at least 1 M.2 SSD slot, in 13 reports. Some firmware leaves a slot out, so there may be more.
Is this my desktop?
Check the model name on the front or the label of the case. It should read Precision Tower 3420.