HP 280 Pro G5 MT Business PC
Desktop, from 2019 2 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
Only 2 machines reported so far, so this answer rests on few examples. Check the label or open the panel before you buy.
Upgradable
Yes. 2 slots, up to 16 GB seen working.
It takes DDR4-2666 full-size sticks (DIMM).
- Slots
- 2 DIMM slots
- Type
- DDR4-2666 288-pin DIMM
- Most seen working
- 16 GB; one machine runs 16 GB
- Firmware says
- 64 GB maximum
- SSD slots
- At least 1 M.2 SSD slot listed by the firmware
- How sure
- 2 of 2 reports show this layout
See 8 GB DDR4-2666 DIMM on AmazonOpens an Amazon search for this exact spec.
Worked out from 2 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 280 Pro G5 MT Business PC?
Yes. 2 slots, up to 16 GB seen working. It takes DDR4-2666 full-size sticks (DIMM).
What type of RAM does the HP 280 Pro G5 MT Business PC use?
DDR4-2666 full-size sticks (DIMM, 288-pin).
Does the HP 280 Pro G5 MT Business PC have an M.2 SSD slot?
Yes. The firmware lists at least 1 M.2 SSD slot, in 2 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 280 Pro G5 MT Business PC.