Dell Precision WorkStation 390
Desktop, from 2007 10 hardware reports
Memory
Up to 6 GB
4 full-size slots
Drives and power
Coming next
Checked from separate sources
Upgradable
Yes. 4 slots, up to 6 GB seen working.
It takes DDR-667 full-size sticks (DIMM).
- Slots
- 4 DIMM slots
- Type
- DDR-667 DIMM
- Most seen working
- 6 GB in two or more machines; one machine runs 8 GB
- Firmware says
- 8 GB maximum (often wrong, so we show what machines run)
- How sure
- 10 of 10 reports show this layout
See 8 GB DDR-667 DIMM on AmazonOpens an Amazon search for this exact spec.
Worked out from 10 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 WorkStation 390?
Yes. 4 slots, up to 6 GB seen working. It takes DDR-667 full-size sticks (DIMM).
What type of RAM does the Dell Precision WorkStation 390 use?
DDR-667 full-size sticks (DIMM).
How much RAM can the Dell Precision WorkStation 390 take?
Machines in the reports run up to 6 GB, and one runs 8 GB. The firmware reports a maximum of 8 GB, a figure that is often wrong.
Is this my desktop?
Check the model name on the front or the label of the case. It should read Precision WorkStation 390.