Geforce GTX Titan X power consumption limited below 200W when the temperature raises to 85C

I have four Geforce GTX Titan X cards for numerical computing, and I can see 91C is the highest temperature allowed. However, I observe the the power consumption is limited below 200W when the temperature raises to 85C. Before reaching 85C, I can see the power consumption goes over 200W frequently. I wonder if there’s any other temperature threshold which causes the power being limited. I’m using ubuntu 16.04.3. LTS. Thank you.
nvidia-bug-report.log.gz (781 KB)