Dell External OEMR R620 Owner's Manual page 116

Environmental
Expanded Operating Temperature Restrictions
Storage Temperature
116
• Do not perform a cold startup below 5 °C.
• The operating temperature specified is for a
maximum altitude of 3050 m (10,000 ft).
• PCIe SSDs are not supported
• GPU is not supported
• LRDIMM is not supported
• 130 W (4 core) and 135 W processor is not
supported
• Redundant power supplies are required
• Non Dell qualified peripheral cards and/or
peripheral cards greater than 25 W are not
supported
–40 °C to 65 °C (–40 °F to 149 °F) with a maximum
temperature gradation of 20 °C per hour.