HP ZHAN 99 Mobile Workstation G1
Laptop, from 2018 2 hardware reports
Memory

Up to 32 GB
2 laptop-size slots
SSD

1+ M.2
At least 1 M.2 SSD slot
SSD length and charger
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 32 GB seen working.
It takes DDR4-2400 laptop-size sticks (SO-DIMM).
- Slots
- 2 SO-DIMM slots
- Type
- DDR4-2400 260-pin SO-DIMM
- Most seen working
- 32 GB in two or more machines
- Firmware says
- 32 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 16 GB DDR4-2400 SO-DIMM on AmazonOpens an Amazon search for this exact spec.
Worked out from 2 hardware reports of this laptop. Sources and method. Updated 9 Nov 2026.

2 laptop-size slots
Illustration Questions
Can I upgrade the RAM in the HP ZHAN 99 Mobile Workstation G1?
Yes. 2 slots, up to 32 GB seen working. It takes DDR4-2400 laptop-size sticks (SO-DIMM).
What type of RAM does the HP ZHAN 99 Mobile Workstation G1 use?
DDR4-2400 laptop-size sticks (SO-DIMM, 260-pin).
How much RAM can the HP ZHAN 99 Mobile Workstation G1 take?
Machines in the reports run up to 32 GB. That matches the 32 GB maximum the firmware reports.
Does the HP ZHAN 99 Mobile Workstation G1 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 laptop?
Check the model name on the label underneath. It should read ZHAN 99 Mobile Workstation G1.