HP Pavilion Laptop 17-ar0xx
Yes. 2 slots, up to 8 GB seen working.
It takes DDR4-1866 laptop-size sticks (SO-DIMM).
- Slots
- 2 SO-DIMM slots
- Type
- DDR4-1866 260-pin SO-DIMM
- Most seen working
- 8 GB in two or more machines; one machine runs 20 GB
- Firmware says
- 16 GB maximum (often wrong, so we show what machines run)
- How sure
- 6 of 6 reports show this layout
Worked out from 6 hardware reports of this laptop. Sources and method. Updated 9 Nov 2026.
Batteries in these laptops report 42 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 6 battery readings. Sources and method. Updated 9 Nov 2026.
IllustrationQuestions
Can I upgrade the RAM in the HP Pavilion Laptop 17-ar0xx?
Yes. 2 slots, up to 8 GB seen working. It takes DDR4-1866 laptop-size sticks (SO-DIMM).
What type of RAM does the HP Pavilion Laptop 17-ar0xx use?
DDR4-1866 laptop-size sticks (SO-DIMM, 260-pin).
How much RAM can the HP Pavilion Laptop 17-ar0xx take?
Machines in the reports run up to 8 GB, and one runs 20 GB. The firmware reports a maximum of 16 GB, a figure that is often wrong.
What battery does the HP Pavilion Laptop 17-ar0xx use?
Batteries in these laptops report 42 Wh, going by 6 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 Pavilion Laptop 17-ar0xx.