Dell Precision 3660
Desktop, from 2022 13 hardware reports
Memory
Up to 64 GB
4 full-size slots
SSD
2+ M.2
At least 2 M.2 SSD slots
Drives and power
Coming next
Checked from separate sources
Upgradable
Yes. 4 slots, up to 64 GB seen working.
It takes DDR5-4400 full-size sticks (DIMM).
- Slots
- 4 DIMM slots
- Type
- DDR5-4400 288-pin DIMM
- Most seen working
- 64 GB in two or more machines; one machine runs 128 GB
- Firmware says
- 128 GB maximum (often wrong, so we show what machines run)
- SSD slots
- At least 2 M.2 SSD slots listed by the firmware
- How sure
- 13 of 13 reports show this layout
See 16 GB DDR5-4400 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 3660?
Yes. 4 slots, up to 64 GB seen working. It takes DDR5-4400 full-size sticks (DIMM).
What type of RAM does the Dell Precision 3660 use?
DDR5-4400 full-size sticks (DIMM, 288-pin).
How much RAM can the Dell Precision 3660 take?
Machines in the reports run up to 64 GB, and one runs 128 GB. The firmware reports a maximum of 128 GB, a figure that is often wrong.
Does the Dell Precision 3660 have an M.2 SSD slot?
Yes. The firmware lists at least 2 M.2 SSD slots, 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 3660.