HP Pro SFF 400 G9 Desktop PC
Desktop, from 2022 3 hardware reports
Memory
Up to 16 GB
2 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. 2 slots, up to 16 GB seen working.
It takes DDR4-3200 full-size sticks (DIMM).
- Slots
- 2 DIMM slots
- Type
- DDR4-3200 288-pin DIMM
- Most seen working
- 16 GB in two or more machines
- 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
- 3 of 3 reports show this layout
See 8 GB DDR4-3200 DIMM on AmazonOpens an Amazon search for this exact spec.
Worked out from 3 hardware reports of this desktop. Sources and method. Updated 9 Nov 2026.
2 full-size slots
Illustration Questions
Can I upgrade the RAM in the HP Pro SFF 400 G9 Desktop PC?
Yes. 2 slots, up to 16 GB seen working. It takes DDR4-3200 full-size sticks (DIMM).
What type of RAM does the HP Pro SFF 400 G9 Desktop PC use?
DDR4-3200 full-size sticks (DIMM, 288-pin).
How much RAM can the HP Pro SFF 400 G9 Desktop PC take?
Machines in the reports run up to 16 GB. The firmware reports a maximum of 64 GB, a figure that is often wrong.
Does the HP Pro SFF 400 G9 Desktop PC have an M.2 SSD slot?
Yes. The firmware lists at least 1 M.2 SSD slot, in 3 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 Pro SFF 400 G9 Desktop PC.