Intel Core2 Duo Desktop Processor, Intel Pentium Processor, and Intel Pentium 4 Processor 6x1 Sequence

Thermal Management Logic and Thermal Monitor Feature

40 Thermal and Mechanical Design Guidelines

sensitivity to noise. Since the DTS is factory set on a per-part basis there is no need

for the health monitor components to be updated at each processor family.

Note: Intel

Core

™

2 Duo processor E6000 and E4000 sequences and Intel

Pentium

Dual

Core processor E2000 sequence do not have an on-die thermal diode. The T

CONTROL

the MSR is relevant only to the DTS.

4.2.11 Platform Environmental Control Interface (PECI)

The PECI interface is a proprietary single wire bus between the processor and the

chipset or other health monitoring device. At this time the digital thermal sensor is the

only data being transmitted. For an overview of the PECI interface see PECI Feature

Set Overview. For additional information on the PECI see the Intel

Core™2 Duo

Extreme Processor X6800 and Intel

Core™2 Duo Desktop Processor E6000 and

E4000 Sequence Datasheet.

The PECI bus is available on pin G5 of the LGA 775 socket. Starting with the Intel

ICH8 IO Controller Hub has integrated a PECI host controller. The PECI interface and

the Manageability Engine, embedded in the Intel 965 Express chipset family, are key

elements to the Intel

Quiet System Technology (Intel

QST), see Chapter 7 and the

Intel

Quiet System Technology Configuration and Tuning Manual.

Intel has worked with many vendors that provide fan speed control devices to provide

PECI host controllers. Consult the local representative for your preferred vendor for

their product plans and availability.