HP rp7405 User Guide, Third Edition - hp rp7405/rp7410 Servers - Page 120

System Specifications Environmental Specifications PCI/Mass Storage Section Cooling Six (6) 92mm 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. Perforation 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 be run at 1541 rpm, or 38% 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 B-6 Typical hp rp7405/rp7410 Configurations Cell Boards Memory Per Cell Board PCI Cards (assumes 10 watts each) DVDs Hard Disk Drives Core I/O Bulk Power Supplies Typical Power Typical Cooling Qty 2 2 2 1 GBytes Qty 16 16 8 8 4 8 4 8 Qty 2 0 0 0 Qty 4 2 2 1 Qty 2 2 2 1 Qty 2 2 2 2 Watts 2000 1810 1757 1148 Watts 6826 6179 5998 3919 Acoustic Noise Specification The acoustic noise specification for the hp rp7410 server is 57.3 db (sound pressure level at bystander position) It is appropriate for dedicated computer room environments, 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. Air Flow The hp rp7405/rp7410 servers require that the cabinet air intake temperature be between 68° F and 77° F (20° C and 25° C) at 960 CFM. 98 Appendix B