Intel
®
Xeon
®
Processor C5500/C3500 Series and LGA1366 Socket
August 2010
Thermal/Mechanical Design Guide
Order Number: 323107-002US
56
Thermal Solutions
For the ATCA reference heatsink, see
specifies
Ψ
CA
target at 30 CFM per blade.
shows
Ψ
CA
and pressure drop for
the ATCA heatsink versus the airflow provided. Best-fit equations are provided to
prevent errors associated with reading the graph.
7.2
Heat Pipe Considerations
shows the orientation and position of the TTV die. The TTV die is sized and
positioned similar to the processor die.
Figure 7-2. ATCA Heatsink Performance Curves
0
0.5
1
1.5
2
2.5
0
5
10
15
20
25
30
35
CFM Through Fins
Ψ
ca
, C
/W
0
0.4
0.8
1.2
1.6
2
Δ
P, in
ch
water
Δ
P = 1.3e-04 CFM^2 +1.1e-02 CFM
Mean
Ψ
ca
= 0.337 + 1.625 * CFM
-0.939