All I know about Heceta is:
It is a chip that is used for Hardware Monitoring. It was present in some intel board like D925XHY, D925XEHY, D945PWM, D945GCL etc. On Server board SE7500WV2, the baseboard management controller uses this chip for hardware monitoring.
On some desktop board these features are present only if it does have Heceta support:
From the Bios, you will have these options:
Advanced > Fan Control Configuration and the Advanced > Hardware Monitoring
Advanced > Fan Control Configuration Submenu Options > Fan COntrol & Lowest Fan Speed.
Processor Zone Temperature Displays processor zone temperature
System Zone 1 Temperature Displays system zone 1 temperature
System Zone 2 Temperature Displays system zone 2 temperature
Processor Fan Speed Displays processor fan speed
Rear Fan Speed Displays rear fan speed
VREG Fan Speed Displays VREG fan speed
Front Fan Speed Displays front fan speed
All the best,