Alienware 15 R4
Yes. 2 slots, up to 32 GB seen working.
It takes DDR4-2666 laptop-size sticks (SO-DIMM).
- Slots
- 2 SO-DIMM slots
- Type
- DDR4-2666 260-pin SO-DIMM
- Most seen working
- 32 GB in two or more machines
- Firmware says
- 32 GB maximum
- 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 45 Wh or 87 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 Alienware 15 R4?
Yes. 2 slots, up to 32 GB seen working. It takes DDR4-2666 laptop-size sticks (SO-DIMM).
What type of RAM does the Alienware 15 R4 use?
DDR4-2666 laptop-size sticks (SO-DIMM, 260-pin).
How much RAM can the Alienware 15 R4 take?
Machines in the reports run up to 32 GB. That matches the 32 GB maximum the firmware reports.
What battery does the Alienware 15 R4 use?
Batteries in these laptops report 45 Wh or 87 Wh, going by 6 reports. Other pack sizes may have shipped, so check the capacity printed on yours.