R2  memory spec: Minimum: 8GbMaximum: 64Gb 4x 288-Pin DDR4 SDRAM Slots for use with the following configurations:
What kind of ram does the Alienware Area 51 r2 ( Desktop ) use? I looked at the manual but I don't think it really specifies. I currently have 4 sticks ( 4gb ram each ) for a total of 16 gb. I want to upgrade to 4 sticks ( 8gb ram each ) for a total of 64gb of ram. Please be detailed with your explanation. 
Alienware Area 51 r2 ( Desktop )