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Technical rules for system fans
Your server supports two types of fans:
• Standard fan (27000 RPM)
• Performance fan (29000 RPM)
Server model
8 x 2.5'', 8 x 3.5'',
16 x 2.5''
12 x 3.5'', 24 x
2.5''
backplane-less
Notes:
• If your server is configured with one processor, five system fans (fan 1 to fan 5) are adequate to provide
proper cooling. However, you must keep the location for fan 6 occupied by a fan filler to ensure proper
airflow. Install fan 6 when there are two processors onboard.
• If there is an OCP 3.0 Ethernet adapter installed, when the system is powered off but still plugged in to AC
power, fan 1 and fan 2 will continue to spin at a much lower speed. This is the system design to provide
proper cooling for the OCP 3.0 Ethernet adapter.
ThinkSystem SR665 Maintenance Manual
148
With GPUs/CX6 adapters
Performance
Performance
Performance
Fan type
Without GPUs/CX6 adapter
Standard
Performance
Performance
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