4. Thermal protection

The C600 card contains internal thermal protection mechanisms which should only be triggered in cases where airflow fails or there is some other fault condition. A register available on the SMBus shows whether any of these protection mechanisms have been triggered.

Initial mechanisms reduce performance while maintaining card operation and will recover once the temperature reduces. These might be seen for high inlet temperatures or poor airflow. Protection mechanisms at higher temperatures will only trigger under card fault conditions and will result in the loss of the application session.

A summary of the protection mechanisms is given in Table 4.1.

Table 4.1 C600 thermal protection

Protection sensor	Trigger value	Recovery value	Protection mechanism
IPU on-chip PVT	78	76	Power capping set to 132 W by ICU firmware
IPU on-chip PVT	85	80	IPU clock reduced to 200 MHz by ICU firmware
IPU on-chip PVT	92	None	IPU power removed by ICU firmware
IPU on-chip PVT	97	None	IPU placed into reset by direct hardware control