Intel Core2 Duo Desktop Processor, Intel Pentium Processor, and Intel Pentium 4 Processor 6x1 Sequence
Intel® Enabled Balanced Technology Extended (BTX) Reference solution
Thermal and Mechanical Design Guidelines 41
5 Intel
®
Enabled Balanced
Technology Extended (BTX)
Reference solution
5.1 Overview of the Balanced Technology Extended
(BTX) Reference Design
The reference thermal module assembly is a Type II BTX compliant design and is
compliant with the reference BTX motherboard keep-out and height recommendations
defined Section 6.5.
The solution comes as an integrated assembly. An isometric view of the assembly is
provided
Figure 13.
5.1.1 Target Heatsink Performance
Table 3 provides the target heatsink performance for the 775_VR_CONFIG_06 65 W
processors with the BTX boundary conditions. The results will be evaluated using the
test procedure described in Section 5.2.
The table also includes a T
A
assumption of 35.5 °C for the Intel reference thermal
solution at the processor fan heatsink inlet discussed Section
3.3. The analysis
assumes a uniform external ambient temperature to the chassis of 35 °C across the
fan inlet, resulting in a temperature rise, T
R
, of 0.5 °C. Meeting T
A
and Ψ
CA
targets can
maximize processor performance (refer to Sections
2.2, 2.4. and Chapter 4).
Minimizing T
R
, can lead to improved acoustics.
Table 3. Balanced Technology Extended (BTX) Reference Heatsink Performance Targets
for 775_VR_CONFIG_06 65 W Processors
Processor Thermal Performance Ψca
(Mean + 3σ)
T
A
Assumption
Notes
Intel
®
Core™2 Duo desktop processor E6000
sequence with 4 MB cache
0.38 °C/W 35.5 °C 1,2
Intel
®
Core™2 Duo desktop processor
E6000/E4000 sequence with 2 MB cache
0.40 °C/W 35.5 °C 1,2
Intel
®
Pentium
®
Dual Core processor E2000
sequence
0.40 °°C/W 35.5 °°C 1,2
Intel
®
Pentium
®
4 processor 6x1 sequence 0.44 °C/W 35.5 °C 2
NOTE:
1. The difference in the target Ψ ca between the Intel
®
Core™2 Duo desktop processor
E6000/E4000 sequence with 4 MB cache and 2 MB cache is due to a slight difference in
the die size.
2. Performance targets (Ψ ca) as measured with a live processor at TDP.