Intel X5365 Design Guide - Page 46
Equation 2-11.y = 0.249x + 40
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Thermal/Mechanical Reference Design Figure 2-21. 1U CEK Thermal Adherence to Quad-Core Intel® Xeon® Processor E5300 Series Thermal Profile Temperature ( C ) 65 TCASE_MAX @TDP 60 Thermal Profile Y=0.293*X+42.6 55 50 TCASE_MAX @P _PROFILE_MIN 45 1U CEK Reference Solution Y=0.249*X+40 40 0 5 10 15 20 25 30 35 40 45 50 55 60 P_ PROFILE_MIN Power(W) 65 70 75 80 TDP The 1U CEK Intel reference thermal solution is designed to meet the Thermal Profile for the Quad-Core Intel® Xeon® Processor L5300 Series in volumetrically constrained form factors. From Table 2-6 the three-sigma (mean+3sigma) performance of the thermal solution is computed to be 0.249 °C/W and the processor local ambient temperature (TLA) for this thermal solution is 40 °C. Hence, the Thermal Profile equation for this thermal solution is calculated as: Equation 2-11.y = 0.249x + 40 where, y = Processor TCASE value (°C) x = Processor power value (W) Figure 2-22 below shows the comparison of this reference thermal solution's Thermal Profile to the Quad-Core Intel® Xeon® Processor L5300 Series Thermal Profile specification. The 1U CEK solution meets the Thermal Profile with 4.5 °C margin at the lower end (P_PROFILE_MIN) and 7.5°C margin at the upper end (TDP). By designing to Thermal Profile, it is ensured that no measurable performance loss due to TCC activation is observed under the given environmental conditions. 46 Quad-Core Intel® Xeon® Processor 5300 Series Thermal/Mechanical Design Guidelines (TMDG)