Table 1. Specifications (7X69 and 7X70) (continued)
Heat output Approximate heat output: 
•  Minimum configuration: 579 BTU, 169 W (in BTU per hour and watts)
•  Maximum configuration: 5320 BTU, 1559 W (in BTU per hour and watts)
Environment ThinkSystem SR860 complies with ASHRAE class A2 specifications. Depending on the 
hardware configuration, some solution models comply with ASHRAE Class A3 or Class 
A4 specifications. System performance may be impacted when operating temperature 
is outside ASHRAE A2 specification or fan failed condition.  
Note: the GPU cards are not supported with ASHRAE Class A3 and Class A4 
specifications.
The ThinkSystem SR860 is supported in the following environment:
•  Air temperature: 
–  Operating 
–  ASHRAE Class A2: 10°C to 35°C (50°F to 95°F); the maximum ambient 
temperature decreases by 1°C for every 300 m (984 ft) increase in altitude 
above 900 m (2,953 ft).
–  ASHRAE Class A3: 5°C to 40°C (41°F to 104°F); the maximum ambient 
temperature decreases by 1°C for every 175 m (574 ft) increase in altitude 
above 900 m (2,953 ft).
–  ASHRAE Class A4: 5°C to 45°C (41°F to 113°F); the maximum ambient 
temperature decreases by 1°C for every 125 m (410 ft) increase in altitude 
above 900 m (2,953 ft).
–  Server off: 5°C to 45°C (41°F to 113°F)
–  Shipment/storage: -40°C to 60°C (-40°F to 140°F)
•  Maximum altitude: 3,050 m (10,000 ft)
•  Relative Humidity (non-condensing): 
–  Operating 
–  ASHRAE Class A2: 8% to 80%; maximum dew point: 21°C (70°F)
–  ASHRAE Class A3: 8% to 85%; maximum dew point: 24°C (75°F)
–  ASHRAE Class A4: 8% to 90%; maximum dew point: 24°C (75°F)
–  Shipment/storage: 8% to 90%
•  Particulate contamination  
Airborne particulates and reactive gases acting alone or in combination with other 
environmental factors such as humidity or temperature might pose a risk to the 
server. For information about the limits for particulates and gases, see “Particulate 
contamination” on page 194.
Firmware updates
Several options are available to update the firmware for the server.
You can use the tools listed here to update the most current firmware for your server and the devices that are 
installed in the server.  
Note: Lenovo typically releases firmware in bundles called UpdateXpress System Packs (UXSPs). To ensure 
that all of the firmware updates are compatible, you should update all firmware at the same time. If you are 
updating firmware for both the Lenovo XClarity Controller and UEFI, update the firmware for Lenovo XClarity 
Controller first.
Best practices related to updating firmware is available at the following location:
Chapter 1. Introduction 5