Alienware X51 R2
Desktop, from 2013 9 hardware reports
Memory
Up to 16 GB
2 full-size slots
Drives and power
Coming next
Checked from separate sources
Upgradable
Yes. 2 slots, up to 16 GB seen working.
It takes DDR3-1600 full-size sticks (DIMM).
- Slots
- 2 DIMM slots
- Type
- DDR3-1600 240-pin DIMM
- Most seen working
- 16 GB in two or more machines
- Firmware says
- 16 GB maximum
- How sure
- 9 of 9 reports show this layout
See 8 GB DDR3-1600 DIMM on AmazonOpens an Amazon search for this exact spec.
Worked out from 9 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 Alienware X51 R2?
Yes. 2 slots, up to 16 GB seen working. It takes DDR3-1600 full-size sticks (DIMM).
What type of RAM does the Alienware X51 R2 use?
DDR3-1600 full-size sticks (DIMM, 240-pin).
How much RAM can the Alienware X51 R2 take?
Machines in the reports run up to 16 GB. That matches the 16 GB maximum the firmware reports.
Is this my desktop?
Check the model name on the front or the label of the case. It should read X51 R2.