Nebs Thermal Profile - Intel X3350 - Xeon 2.66 Ghz 12M L2 Cache 1333MHz FSB LGA775 Quad-Core Processor Design Manual

Thermal Solutions
7.5.2

NEBS Thermal Profile

Processors that offer a NEBS thermal profile are specified in the Intel
Processor C5500/C3500 Series Datasheet).
NEBS thermal profiles help relieve thermal constraints for Short-Term NEBS conditions.
To help reliability, processors must meet the nominal thermal profile under standard
operating conditions and can only rise up to the Short-Term spec for NEBS excursions
(see Figure
year limit is a key consideration.
Note: Fan speed can be decreased and case temperatures can be allowed to rise above the
thermal profile if the processor is below Tcontrol (see
thermal profile at these lower temperatures is not considered a risk to reliability.
Figure 7-6.

NEBS Thermal Profile

Note:
1.) The thermal specifications shown in this graph are for reference only. See the Intel
C3500 Series Datasheet for the Thermal Profile specifications. In case of conflict, the data information in the
Datasheet supersedes any data in this figure.
2.) The Nominal Thermal Profile must be used for all normal operating conditions, or for products that do not
require NEBS Level 3 compliance.
3.) The Short-Term Thermal Profile may only be used for short-term excursions to higher ambient operating
temperatures, not to exceed 360 hours per year as compliant with NEBS Level 3.
4.) Implementation of either thermal profile should result in virtually no TCC activation.
5.) Utilization of a thermal solution that exceeds the Short-Term Thermal Profile, or which operates at the Short-
Term Thermal Profile for a duration longer than the limits specified in Note 3 above, do not meet the processor
thermal specifications and may result in permanent damage to the processor.
August 2010
Order Number: 323107-002US
7-6). Short-Term is clearly defined for NEBS Level 3 but the 360 hours per
Section
® ®
Intel Xeon Processor C5500/C3500 Series and LGA1366 Socket
® ®
Xeon
7.6.1). Exceeding the
® ®
Xeon Processor C5500/
Thermal/Mechanical Design Guide
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