Intel 2ND GENERATION CORE PROCESSOR FAMILY DESKTOP - THERMAL MECHANICAL S AND DESIGN GUIDELINES 01-2011, Specifications

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Sensor Based Thermal Specification Design Guidance
74 Thermal/Mechanical Specifications and Design Guidelines
Notes:
Notes:
1. 
CA
at “DTS = T
control
” is applicable to systems that has Internal Trise (Troom temperature to Processor
cooling fan inlet) of less than 10 C. In case your expected Trise is grater than 10 C a correction factor
should be used as explained below. For each 1 deg C Trise above 10C, the correction factor CF is defined as
CF= 1.7 / Processor_TDP.
2. Example, For A Chassis Trise assumption of 12 C for a 95W TDP processor.
CF = 1.7/95W = 0.018/C
For Trise > 10 C
 CA at Tcontrol = Value listed in Column_2 - (Trise - 10) * CF
 CA = 0564 - (12 - 10) * 0.018 =0.528 C/W
In this case the fan speed should be set slightly higher equivalent to YCA=0.528C/W
Figure 8-8. DTS 1.1 Definition Points
Table 8-1. DTS 1.1 Thermal Solution Performance above T
CONTROL
Processor TDP

CA
at
DTS = T
CONTROL
1,2

CA
at
DTS = -1
At System
ambient_max=
40C

CA
at
DTS = -1
At System
ambient_max =
45C

CA
at
DTS = -1
At System
ambient_max =
50C
95W 0.564 0.343 0.291 0.238
65W 0.755 0.448 0.371 0.294
45W 1.165 0.662 0.551 0.440
35W 1.361 0.714 0.571 0.429