Alienware X51 R2 specifications Drives, Power, Computer Environment, Grms

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