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Intel Xeon X3440 BX80605X3440 User Manual

Product codes
BX80605X3440
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Page of 106
Thermal Specifications
42
Document Number: 424077 Revision: 2.0Thermal/Mechanical 
Specifications and Design Guidelines
6.1.3
Processor Specification for Operation Where Digital 
Thermal Sensor Exceeds T
CONTROL
When the DTS value is less than T
CONTROL
, the fan speed control algorithm can reduce 
the speed of the thermal solution fan. This remains the same as with the previous 
guidance for fan speed control.
During operation, when the DTS value is greater than T
CONTROL
, the fan speed control 
algorithm must drive the fan speed to meet or exceed the target thermal solution 
performance (Ψ
CA
) shown in 
 for the  Intel
® 
Xeon
®
 processor 3400 series (95 
W), 
 for the Intel
® 
Xeon
®
 processor 3400 series (45W) . To get the full 
acoustic benefit of the DTS specification, ambient temperature monitoring is necessary. 
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
AMBIENT
 by the following equation:
Ψ
CA
 = 0.29 + (45.1 - T
AMBIENT
) x 0.0181
3.
This column can be expressed as a function of T
AMBIENT
 by the following equation:
Ψ
CA
 = 0.29 + (45.1 - T
AMBIENT
) x 0.0105
Table 6-4.
Thermal Solution Performance above T
CONTROL
 for the Intel
® 
Xeon
®
 Processor 
3400 Series (95W)
T
AMBIENT
1
Ψ
CA
 at 
DTS = T
CONTROL
2
Ψ
CA
 at 
DTS = -1
3
45.1
0.290
0.290
44.0
0.310
0.301
43.0
0.328
0.312
42.0
0.346
0.322
41.0
0.364
0.333
40.0
0.383
0.343
39.0
0.401
0.354
38.0
0.419
0.364
37.0
0.437
0.375
36.0
0.455
0.385
35.0
0.473
0.396
34.0
0.491
0.406
33.0
0.510
0.417
32.0
0.528
0.427
31.0
0.546
0.438
30.0
0.564
0.448
29.0
0.582
0.459
28.0
0.600
0.469
27.0
0.618
0.480
26.0
0.637
0.491
25.0
0.655
0.501
24.0
0.673
0.512
23.0
0.691
0.522
22.0
0.709
0.533
21.0
0.727
0.543
20.0
0.746
0.554