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6.1.1.1
Specification for Operation Where Digital Thermal Sensor Exceeds
T
CONTROL
When the DTS value is less than T
the speed of the thermal solution fan. This remains the same as with the previous
guidance for fan speed control.
During operation where the DTS value is greater than T
algorithm must drive the fan speed to meet or exceed the target thermal solution
performance (Ψ
(T
AMBIENT
defined for various ambient temperature conditions. See the appropriate processor
Thermal and Mechanical Design Guidelines (see
characterizing the fan speed to Ψ
Table 6-3.
Thermal Solution Performance above T
T
AMBIENT
43.2
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
19.0
18.0
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
Y
= 0.19 + (43.2 – T
CA
3.
This column can be expressed as a function of T
Y
= 0.19 + (43.2 – T
CA
82
) shown in
Table
CA
) is required to fully implement the specification as the target Ψ
1
Ψ
at DTS = T
CA
0.190
0.206
0.219
0.232
0.245
0.258
0.271
0.284
0.297
0.310
0.323
0.336
0.349
0.362
0.375
0.388
0.401
0.414
0.427
0.440
0.453
0.466
0.479
0.492
0.505
0.519
) * 0.013
AMBIENT
) * 0.0077
AMBIENT
the fan speed control algorithm can reduce
CONTROL
CONTROL
6-3. The ability to monitor the inlet temperature
Section
and ambient temperature measurement.
CA
CONTROL
2
Ψ
at DTS = -1
CONTROL
CA
0.190
0.199
0.207
0.215
0.222
0.230
0.238
0.245
0.253
0.261
0.268
0.276
0.284
0.292
0.299
0.307
0.315
0.322
0.330
0.338
0.345
0.353
0.361
0.368
0.376
0.384
by the following equation:
AMBIENT
by the following equation:
AMBIENT
Intel® Xeon® Processor 3500 Series Datasheet Volume 1
Thermal Specifications
, the fan speed control
is explicitly
CA
1.2) for details on
3
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