Inlet Temperature versus Airflow Requirement in Server
The following tables provide the estimated airflow rate and airflow speed to
the MA35D card under various operating
conditions. For a higher or lower total card power target, ensure the appropriate
air flow and inlet temperature conditions are in place.
Table 1. Normal Flow into I/O Bracket at Sea Level
Inlet Temperature vs Airflow
Requirement of PCIe Card Slot
(56.51 mm x 20.33 mm) at Sea Level for 33W Total Card Power |
Inlet Temperature (°C) |
Airflow (CFM) |
Air Speed (LFM) |
System Pressure Drop (inwg) |
25.0 |
1.8 |
150 |
0.07 |
30.0 |
2.0 |
170 |
0.08 |
35.0 |
2.2 |
190 |
0.10 |
40.0 |
2.5 |
210 |
0.11 |
45.0 |
3.0 |
240 |
0.14 |
50.0 |
3.6 |
290 |
0.18 |
55.0 |
4.6 |
370 |
0.26 |
Table 2. Normal Flow into I/O Bracket at 1800m above Sea
Level
Inlet Temperature vs Airflow
Requirement of PCIe Card Slot
(56.51 mm x 20.33 mm) at 1800m above Sea Level for 33W Total Card
Power |
Inlet Temperature (°C) |
Airflow (CFM) |
Air Speed (LFM) |
System Pressure Drop (inwg) |
25.0 |
2.0 |
170 |
0.08 |
30.0 |
2.2 |
190 |
0.10 |
35.0 |
2.5 |
210 |
0.11 |
40.0 |
2.8 |
230 |
0.13 |
45.0 |
3.3 |
270 |
0.16 |
50.0 |
4.0 |
330 |
0.21 |
55.0 |
5.1 |
420 |
0.31 |
Table 3. Reverse Flow into I/O Bracket at Sea Level
Inlet Temperature vs Airflow
Requirement of PCIe Card Slot
(56.51 mm x 20.33 mm) at Sea Level for 33W Total Card Power |
Inlet Temperature (°C) |
Airflow (CFM) |
Air Speed (LFM) |
System Pressure Drop (inwg) |
25.0 |
1.2 |
130 |
0.07 |
30.0 |
1.4 |
150 |
0.08 |
35.0 |
1.5 |
160 |
0.09 |
40.0 |
1.7 |
180 |
0.10 |
45.0 |
2.0 |
210 |
0.12 |
50.0 |
2.4 |
250 |
0.16 |
55.0 |
3.0 |
320 |
0.21 |
Table 4. Reverse Flow into I/O Bracket at 1800m above Sea
Level
Inlet Temperature vs Airflow
Requirement of PCIe Card Slot
(56.51 mm x 20.33 mm) at 1800m above Sea Level for 33W Total Card
Power |
Inlet Temperature (°C) |
Airflow (CFM) |
Air Speed (LFM) |
System Pressure Drop (inwg) |
25.0 |
1.4 |
150 |
0.08 |
30.0 |
1.5 |
160 |
0.09 |
35.0 |
1.7 |
180 |
0.10 |
40.0 |
1.9 |
200 |
0.12 |
45.0 |
2.2 |
240 |
0.14 |
50.0 |
2.7 |
280 |
0.18 |
55.0 |
3.4 |
360 |
0.25 |