Is it possible to set a minimum CPU utilization threshold within Smarts IP Polling and Thresholds?
No, unfortunately that feature is not currently available in the Smarts Product.
As you can see below.
The only option for CPU utilization monitoring under Polling & Thresholds is to set the maximum utilization value, any value over this threshold will alert, anything under it will not. Plain and simple.
If you would like to see an enhancement made in the Smarts Product that would allow a minimum CPU utilization threshold to be set, please open a ticket with Support for an Enhancement Request.