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SpeedFan 4.46

SpeedFan is a program that monitors voltages, fan speeds and temperatures in computers with hardware monitor chips. SpeedFan can even access S.M.A.R.T. info and show hard disk temperatures. SpeedFan supports SCSI disks too. SpeedFan can even change the FSB on some hardware (but this should be considered a bonus feature).

SpeedFan can access digital temperature sensors and can change fan speeds accordingly, thus reducing noise. SpeedFan can find almost any hardware monitor chip connected to the 2-wire SMBus (System Management Bus (trademark belonging to SMIF, Inc.), a subset of the I2C protocol) and works fine with Windows 9x, ME, NT, 2000, 2003, XP, Vista and Windows 7. It works with Windows 64 bit too.


  • greatly improved DELL support
  • nVidia I2C support works again with driver 275+
  • now ATI Radeon support resets Manual Fan Control to the state it had when SpeedFan was started (no more unexpected video card fan set to 100% on program exit)
  • added support for Intel X79 (Patsburg) SMBus
  • added support for ServerWorks HT1000 SMBus
  • added SAT support for USB enclosures
  • added support for USB enclosures using SunPlus, IoData and Logitech chipsets
  • added voltage reading tweaks and configurations for several Intel motherboards
  • added full support for Fintek F71858AD
  • rewritten Areca RAID support and improved support for Areca SAS controllers
  • slightly refactored hard disk USB vendor guessing
  • added support for AMD Family 12h (LLano) temperature
  • added support for AMD Family 14h (Bobcat) temperature
  • ATK0110 tries to find the best interface when multiple ones are available in ACPI BIOS (please, report if support is broken for your motherboard model)
  • added preliminary support for Fujitsu-Siemens Hades

Download: SpeedFan 4.46 | 2.0 MB (Freeware)
View: SpeedFan Website

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