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adamsfamily
Asked: 2020-02-26 00:12:49 +0800 CST

19" rackmount server fan noise with 3.3 GHz vs 2.4 GHz CPU

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I made a research while looking for a low fan-noise rackmount server.

I visited a datacenter and observed that Fujitsu Primergy RX series had much lower fan noise than HP ProLiant or Dell PowerEdge. So going with Fujitsu.

I'm wondering if putting a 3.3 GHz CPU instead of the lower class 2.4 GHz will increase excess heat and fan noise significantly?

Any experiences with that?

fan cpu-usage rackmount

2 Answers

  1. Many server BIOS/BMC adjust the system fan speed based on the CPU TDP. This means that using, say, a 95w CPU vs a 145w CPU is going to command a significant difference in fan speed and noise.

    I saw (well, eared!) it recently, when having two identical SuperMicro servers with different CPU and memory configuration: the one sporting a Xeon Silver CPU was much quieter than the one having an higher clocked, more core Xeon Gold processor.

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  2. Your comparison will not work because:

    • you compare different computers with different CPUs, memory, disks
    • you compare different computers with different heat path construction inside

    And when you increase the clock of processor by 50% you can expect twice of heat. Also you should check if this particular computer support the new processor (from point of clock from motherboard, cooler, heat, etc.)

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