HP 9000 rp7440 Site Preparation Guide, Fourth Edition - HP Integrity rx7640 an - Page 34

Acoustic Noise Specification, Airflow

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Table 2-9 Typical Server Configurations for the HP Integrity rx7640 Server (continued) Cell Boards Qty 2 1 Memory Per PCI Cards DVDs Cell Board (assumes 10 watts each) GBytes Qty Qty 8 8 0 8 8 0 Hard Disk Core I/O Bulk Power Typical Drives Supplies Power Qty Qty Qty 2 2 2 1 1 2 Watts 1921 1262 Typical Cooling BTU/hr 6558 4308 The air conditioning data is derived using the following equations. • Watts x (0.860) = kcal/hour • Watts x (3.414) = Btu/hour • Btu/hour divided by 12,000 = tons of refrigeration required NOTE: When determining power requirements you must consider any peripheral equipment that will be installed during initial installation or as a later update. Refer to the applicable documentation for such devices to determine the power and air-conditioning that is required to support these devices. Acoustic Noise Specification The acoustic noise specification for the server is 57.3 db (sound pressure level at bystander position) It is appropriate for dedicated computer room environments but not office environments. The LwA is 7.5 Bels. Care should be taken to understand the acoustic noise specifications relative to operator positions within the computer room or when adding servers to computer rooms with existing noise sources. Airflow The recommended server cabinet air intake temperature is between 20° and 25° C (68° and 77° F) at 960 CFM. Figure 2-1 illustrates the location of the inlet and outlet airducts on a single cabinet. Air is drawn into the front of the server and forced out the rear. 34 Server Site Preparation

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Table 2-9 Typical Server Configurations for the HP Integrity rx7640 Server
(continued)
Typical
Cooling
Typical
Power
Bulk Power
Supplies
Core I/O
Hard Disk
Drives
DVDs
PCI Cards
(assumes 10
watts each)
Memory Per
Cell Board
Cell
Boards
BTU/hr
Watts
Qty
Qty
Qty
Qty
Qty
GBytes
Qty
6558
1921
2
2
2
0
8
8
2
4308
1262
2
1
1
0
8
8
1
The air conditioning data is derived using the following equations.
•
Watts x (0.860) = kcal/hour
•
Watts x (3.414) = Btu/hour
•
Btu/hour divided by 12,000 = tons of refrigeration required
NOTE:
When determining power requirements you must consider any peripheral equipment
that will be installed during initial installation or as a later update. Refer to the applicable
documentation for such devices to determine the power and air-conditioning that is required to
support these devices.
Acoustic Noise Specification
The acoustic noise specification for the server is 57.3 db (sound pressure level at bystander
position) It is appropriate for dedicated computer room environments but not office environments.
The LwA is 7.5 Bels. Care should be taken to understand the acoustic noise specifications relative
to operator positions within the computer room or when adding servers to computer rooms with
existing noise sources.
Airflow
The recommended server cabinet air intake temperature is between 20° and 25° C (68° and 77°
F) at 960 CFM.
Figure 2-1
illustrates the location of the inlet and outlet airducts on a single cabinet. Air is drawn
into the front of the server and forced out the rear.
34
Server Site Preparation