Specs Alienware x51 R2 i5-4440 Desktop Intel® Core™ i5 16 GB DDR3-SDRAM 1000 GB HDD Windows 7 Home Premium Mini PC Black PCs/Workstations (ALWX51D-2628)
User manual Alienware X51 R3 (English - 55 pages)
Alienware X51 Service Manual
Dell Alienware x51 r2 Specifications User Manual Reference Guide En us