R720 System Cooling

A Bash script designed to dynamically control fan speeds on a Dell PowerEdge R720 running Linux. Optimizes cooling before, during, and after CPU load for quiet idle operation and aggressive heat dissipation under stress.

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Features

• Dynamic Fan Control: Adjusts fan speeds based on CPU temperature and usage.
• Pre-Cooling: Boosts fans preemptively when CPU usage spikes, minimizing thermal peaks.
• Quiet Idle: Lowers fan speeds at idle (e.g., 40% at 35°C) for reduced noise.
• Aggressive Load Cooling: Scales to 100% (~12,000 RPM) under heavy load (e.g., 55°C or 75% usage).
• System Monitoring: Logs CPU, memory, and power usage alongside temperature data.

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Requirements

• ipmitool: For BMC fan control and sensor readings. Install with sudo pacman -S ipmitool.
• sysstat: For CPU usage monitoring via mpstat. Install with sudo pacman -S sysstat.

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Tested On

CPU Info

Property	Value
Model Name	Intel(R) Xeon(R) CPU E5-2670 v2 @ 2.50GHz
CPU(s)	40 (20 cores, 40 threads with HT)
Scaling MHz	Varies (e.g., 66% of max under load)
Max MHz	3300.0000 (Turbo Boost)
Min MHz	1200.0000 (Idle)
NUMA Node0 CPU(s)	0,2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38
NUMA Node1 CPU(s)	1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31,33,35,37,39

Memory Info

Property	Total	Used	Free	Shared	Buff/Cache	Available
Mem	755Gi	7.0Gi	751Gi	85Mi	1.1Gi	748Gi

System Info

• OS: Linux void-server 6.13.7-arch1-1 #1 SMP PREEMPT_DYNAMIC Thu, 13 Mar 2025 18:12:00 +0000 x86_64 GNU/Linux

Power Usage

• Pwr Consumption: 224.000 Watts (Idle) | OK | Max: 1792W Critical: 1974W

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Installation

1. Clone the repository:

   git clone https://github.com/ORDL-AMF/R720-System-Cooling.git
   cd R720-System-Cooling