EC2 m5.2xlarge CPU speed query

I've launched an EC2 m5.2xlarge instance and Windows says the CPU specification is:

C:\Users\Administrator>wmic cpu get name, maxclockspeed, currentclockspeed
CurrentClockSpeed  MaxClockSpeed  Name
2500               2500           Intel(R) Xeon(R) Platinum 8259CL CPU @ 2.50GHz 

But the AWS EC2 instance type page via the AWS console for a m5.2xlarge says:

Sustained clock speed (GHz)
3.1

Which is correct?

Thanks?