Lenovo ThinkSystem SR645 - Technical Rules; Technical Rules for Processors and Heat; Sinks

Technical rules
Refer to the below technical rules and limitations when you install the related server components.
Technical rules for processors and heat sinks
Understanding the technical rules helps you choose the correct heat sinks, fans, and other components
based on what processors are configured for your server.
Supported heat sinks for processors
The following lists the required heat sinks when different processors are installed.
Heat sink/fan
Processor TDP
120W-155W 180W-280W
Heat sink Standard Performance
Supported fans for processors
The following lists the required fans when different processors are installed.
Processor
Fan type
Fan quantity
10 x 2.5'' models
4 x 2.5'', 4 x 3.5'', 8 x
2.5'' models
STD
1
Perf. STD Perf.
TDP
120W
√ √
155W
√ √
180W-
280W
√ √
Quantity
One
6
2
Two 8
1. Standard fans are enough for low-wattage processors while you can still use performance fans for better
cooling.
2. Two fan dummies (fan cages 7 and 8) are required when one processor is installed.
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ThinkSystem SR645 Setup Guide