Intel QX9770 - Core 2 Extreme Quad-Core Processor User Manual

Intel Thermal/Mechanical Reference Design Information
Thermal and Mechanical Design Guidelines 43
5.1.6 Pump Motor Performance
The pump power requirements for proper operation are given Table 5
Table 5. Pump Electrical Performance Requirements
Requirement Value
Maximum Average motor current draw 1.5 A
Motor start-up current draw 2.2 A
Motor header voltage 12 V ±5%
Tachometer output 3 pulse per revolution
Tachometer output signal Open-collector (open-drain)
Tachometer output signal current sink capability 10 mA
PWM signal input frequency 25 kHz (nominal)
21 kHz to 28kHz (allowable range)
PWM signal pull up in fan 3.3 V (recommended max)
5.25 V (absolute max)
PWM signal current source Imax = 5 mA
(short circuit current)
PWM signal maximum voltage for logic low VIL = 0.8 V
PWM compliant function RPM must be within spec for specified
duty cycle
In addition to comply with overall thermal requirements (see section 5.1.1), the pump
should meet the environment reliability requirements (see Section 5.2).

Intel QX9770 - Core 2 Extreme Quad-Core Processor Specifications

General

Processor Number	QX9770
Number of Cores	4
Thread Count	4
Clock Speed	3.2 GHz
L2 Cache	12 MB
Bus Speed	1600 MHz
Thermal Design Power (TDP)	136 W
Socket	LGA 775
Manufacturing Process	45 nm
Max Operating Temperature	64.5°C
Virtualization Technology	Yes
64-bit Support	Yes
Instruction Set	SSE4.1
Memory Channels	2
Memory Types	DDR3