HP ZBook 15 G3
Yes. 4 slots, up to 48 GB seen working.
It takes DDR4-2133 laptop-size sticks (SO-DIMM).
- Slots
- 4 SO-DIMM slots
- Type
- DDR4-2133 260-pin SO-DIMM
- Most seen working
- 48 GB in two or more machines; one machine runs 64 GB
- Firmware says
- 32 GB maximum (often wrong, so we show what machines run)
- How sure
- 37 of 37 reports show this layout
Worked out from 37 hardware reports of this laptop. Sources and method. Updated 9 Nov 2026.
Batteries in these laptops report 90 Wh.
That is the design capacity the batteries themselves report, and the label can read 1 to 3 Wh higher. Other pack sizes may have shipped, so check the capacity printed on yours before you order.
From 36 battery readings. Sources and method. Updated 9 Nov 2026.
IllustrationQuestions
Can I upgrade the RAM in the HP ZBook 15 G3?
Yes. 4 slots, up to 48 GB seen working. It takes DDR4-2133 laptop-size sticks (SO-DIMM).
What type of RAM does the HP ZBook 15 G3 use?
DDR4-2133 laptop-size sticks (SO-DIMM, 260-pin).
How much RAM can the HP ZBook 15 G3 take?
Machines in the reports run up to 48 GB, and one runs 64 GB. The firmware reports a maximum of 32 GB, a figure that is often wrong.
What battery does the HP ZBook 15 G3 use?
Batteries in these laptops report 90 Wh, going by 36 reports. Other pack sizes may have shipped, so check the capacity printed on yours.
Is this my laptop?
Check the model name on the label underneath. It should read ZBook 15 G3.