Thomas' Theory: How to add a 2.5 SSD to your Alienware X51 R2 without replacing existing 3.5 HDD
How to Upgrade an Old PC to Be Fast Again - Install Samsung EVO 860 SSD on Alienware X51 R1 - YouTube
Solved: X51 R2 i5 RAID SSD - Dell Community
Thomas' Theory: How to add a 2.5 SSD to your Alienware X51 R2 without replacing existing 3.5 HDD
Build, Heat, and Power Consumption - Alienware X51: The Xbox With Teeth
AlienWare X51 Full Refurbish and Update to SSD D05S with full clean UP - YouTube
SSD upgrade for Alienware X51 R2 without replacing existing 3.5TB HDD - Dell Community
Alienware 15 R3 SSD 3 seems to be extremely hard to remove, don't know why this came installed when I bought it it also has windows on it but that shouldn't matter. :