Dell Alienware X51 R2 (Early 2013) - Manual (Page 4)

Drives
Externally accessible One 5.25-inch drive bay for a Blu-ray Disc combo,
DVD+/-RW super multi-drive (slot loaded)
Internally accessible • One 3.5-inch drive bay for a SATA hard drive
• Two 2.5-inch drive bay for SATA hard drives
(optional)
Power
Voltage 100 VAC – 240 VAC
Wattage 240 W or 330 W
Computer Environment
Temperature range:
Operating 10 °C to 35 °C (50 °F to 95 °F)
Storage –10 °C to 45 °C (14 °F to 113 °F)
Relative humidity (maximum) 20% to 80% (noncondensing)
NOTE: Maximum vibration (using a random vibration spectrum that simulates
user environment)
Operating
0.25 GRMS
Storage 2.2 GRMS
NOTE: Maximum shock (Measured with hard drive in operating status
and a 2-ms half-sine pulse for operating. Also measured with hard drive in
head-parked position and a 2-ms half-sine pluse for storage)
Operating
40 G for 2 ms with a change in velocity of
51 cm/s (20 inches/s)
Storage 50 G for 26 ms with a change in velocity of
813 cm/s (320 inches/s)
Altitude (maximum):
Operating –15.2 m to 3,048 m (–50 ft to 10,000 ft)
Storage –15.2 m to 10,668 m (–50 ft to 35,000 ft)
Airborne contaminant level G2 or lower as defined by ISA-S71.04-1985