Site Preparation Guide, Fourth Edition - HP Integrity rx8620 Server

Chapter 1
System Specifications
Environmental Specifications
9
PCI/Mass Storage Section Cooling
Six 92-mm fans located between the mass storage devices and the PCI card cage provide airflow through
these devices. The PCI fans are powered off of housekeeping power and run at full speed at all times. The air
is pulled through the mass storage devices and pushed through the PCI card cage. Separation is provided
between the PCI bulkheads to allow adequate exhaust ventilation and to help reduce the localized airflow
dead spots that typically occur at the faceplate tail of each PCI card.
Standby Cooling
Several components within the chassis consume significant amounts of power while the system is in standby
mode. The system fans will run at a portion of full speed during standby to remove the resulting heat from the
cabinet. The fans within the power supply will operate at full speed during standby.
Typical Power Dissipation and Cooling
Table 1-6 provides calculations for configurations as described in the table.
The air-conditioning data in Table 1-6 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.
Table 1-6 Typical HP Integrity rx8620 Server Configurations
Cell
Board
Memory
per Cell
Board
PCI Cards
(assumes
10W each)
DVDs
Hard
Disk
Drives
Core
I/O
Bulk
Power
Supplies
Typical
Power
Typical
Cooling
Qty GBytes Qty Qty Qty Qty Qty Watts BTU/hour
4 16 16 2 4 2 6 3800 12973
4 8 16 2 4 2 6 3395 11591
4 4 8 0 2 2 6 3177 10846
2 16 16 2 4 2 4 2241 7651
2 8 8 0 2 2 4 1936 6610
2 4 8 0 2 2 4 1880 6418
1 4 8 0 1 1 3 1228 4192