Thermal Solution Characterization; Thermal Solution Performance Above T - Intel Core i7-800 Specifications

7.6

Thermal Solution Characterization

Table 7-1
reference for the development of thermal solutions and the fan speed control
algorithm.
Table 7-1.

Thermal Solution Performance above T

T
AMBIENT
45.1
44.0
43.0
42.0
41.0
40.0
39.0
38.0
37.0
36.0
35.0
34.0
33.0
32.0
31.0
30.0
29.0
28.0
27.0
26.0
25.0
24.0
23.0
22.0
21.0
20.0
Notes:
1. The ambient temperature is measured at the inlet to the processor thermal solution
2. This column can be expressed as a function of T
Ψ = 0.29 + (45.1 - T
CA
3. This column can be expressed as a function of T
Ψ = 0.29 + (45.1 - T
CA
4. This table is provided as a reference please consult the product specification for current values.
5. Based on the testing performed a curve was fit to the data in the form
Psi_ca = a x RPM
a = -1.53 E-11, b = 1.41 E-07, c = -0.00048, d = 0.925782
6. Full Speed of 3150 RPM the DHA-A thermal solution delivers a Ψ
testing.
7. Minimum speed is limited to 1000 RPM to ensure cooling of other system components
58
is early engineering data on the RCBF7-1156 (DHA-A) thermal solution as a
Ψ at
CA
1
2
DTS = T
CONTROL
0.290
0.310
0.328
0.346
0.364
0.383
0.401
0.419
0.437
0.455
0.473
0.491
0.510
0.528
0.546
0.564
0.582
0.600
0.618
0.637
0.655
0.673
0.691
0.709
0.727
0.746
) x 0.0181
AMBIENT
) x 0.0105
AMBIENT
3 2
+b x RPM +c x RPM + d, where:
Sensor Based Thermal Specification Design Guidance
CONTROL
RPM for Ψ at Ψ
CA
5
DTS = T DTS = -1
CONTROL
N/A
N/A
N/A
2950
2600
2300
2100
1900
1750
1650
1500
1400
1350
1200
1150
1050
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
by the following equation:
AMBIENT
by the following equation:
AMBIENT
= 0.335 °C /W based on preliminary
CA
§
Thermal/Mechanical Specifications and Design Guidelines
at RPM for Ψ
CA CA
3
DTS = -1
0.290 N/A
0.301 N/A
0.312 N/A
0.322 N/A
0.333 N/A
0.343 3150
0.354 2750
0.364 2600
0.375 2400
0.385 2250
0.396 2150
0.406 2050
0.417 1900
0.427 1850
0.438 1750
0.448 1650
0.459 1600
0.469 1550
0.480 1450
0.491 1400
0.501 1350
0.512 1300
0.522 1250
0.533 1200
0.543 1150
0.554 1100
at
5