Peci Client Capabilities; Thermal Management; Platform Manageability; Processor Interface Tuning And Diagnostics - Intel BX80619I73820 Design Manual

7.1.1

PECI Client Capabilities

The processor PECI client is designed to support the following sideband functions:
• Processor and DRAM thermal management
• Platform manageability functions including thermal, power, and error monitoring
• Processor interface tuning and diagnostics capabilities (Intel Interconnect BIST).
7.1.1.1

Thermal Management

Processor fan speed control is managed by comparing Digital Thermal Sensor (DTS)
thermal readings acquired usingPECI against the processor-specific fan speed control
reference point, or T
using the processor PECI client. These variables are referenced to a common
temperature, the TCC activation point, and are both defined as negative offsets from
that reference.
PECI-based access to the processor package configuration space provides a means for
Super IO (SIO) or other platform management devices to actively manage the
processor, memory power and thermal features. Details on the list of available power
and thermal optimization services can be found in
7.1.1.2

Platform Manageability

PECI allows read access to certain error and status monitoring registers within the
processor It also provides insight into thermal monitoring functions such as TCC
activation timers and thermal error logs as covered in
7.1.1.3

Processor Interface Tuning and Diagnostics

®
Intel Core™ i7-3960X, i7-3970X processor Extreme Edition, Intel

processor, and Intel

(Intel IBIST) allows for in-field diagnostic capabilities in memory controller interfaces.
PECI provides a port to execute these diagnostics using its PCI Configuration read and
write capabilities.
54
. Both T
CONTROL CONTROL
®
Core™ i7-3820 processor Intel Interconnect Built-In Self Test
and DTS thermal readings are accessible
Section 7.1.2.6.
Section 7.1.2.6.
®
Thermal/Mechanical Specifications and Design Guide
PECI Interface
Core™ i7-3930K