– For common desktop computers: From -40°C (-40°F) to 60°C (140°F)
– For all-in-one desktop computers: From -20°C (-4°F) to 60°C (140°F)
Relative humidity
• Operating: 20%-80% (non-condensing)
• Storage: 10%–90% (non-condensing)
Compliance information
For more compliance information, refer to Regulatory Notice at
Safety and Compliance Notices at
Purchase accessories
Lenovo has a number of hardware accessories and upgrades to help expand the capabilities of your
computer. Options include memory modules, storage devices, network cards, power adapters, keyboards,
mice, and more.
To shop at Lenovo, go to
Purchase additional services
During and after the warranty period, you can purchase additional services from Lenovo at:
https://pcsupport.lenovo.com/warrantyupgrade
Service availability and service name might vary by country or region.
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ThinkCentre M70s Gen 4 ThinkCentre M90s Gen 4 User Guide
https://pcsupport.lenovo.com/docs/generic_notices
https://www.lenovo.com/accessories
https://pcsupport.lenovo.com
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and Generic