If your BIOS was programmed to setup such chips this way you can still try to use SpeedFan's Advanced Configuration to revert to manual (software controlled) mode. Some chips can even be programmed to vary fan speeds without any additional software intervention. From one of the very first hardware monitor chips that could be found in standard PCs, the National Semiconductor LM75 (and all of its clones, like the Philips NE1617 and the Philips NE1618 or the Maxim MAX1617) or the Analog Devices ADM1021, such chips have been greatly improved, both in their precision and in their capabilities.Ĭurrent chips can monitor fan speeds, voltages and control fan speeds by using PWMs (Pulse Width Modulation). Several sensors, like Winbond's and the AS99127F support fan speed changing, as well as others from Maxim, Myson, Analog Devices, National Semiconductor and ITE, but the hardware manufacturer must have connected the relevant pins to some additional, yet trivial, circuitry. SpeedFan can change the FSB on some hardware (but this should be considered a bonus feature). By properly configuring SpeedFan, you can let it change fan speeds based on system temperatures. SpeedFan monitor temperatures from several sources. SpeedFan works with Windows 9x, ME, NT, 2000, 2003, XP, Vista, Windows 7, 2008, Windows 8, Windows 10, Windows 11 and Windows Server 2012. What operating systems are compatible with SpeedFan? SpeedFan can also read S.M.A.R.T information from your hard drives, show CPU usage, chipset information, core temperatures, change clock speed, and analyze voltages. What other features does SpeedFan offer besides controlling fan speed? Once installed, SpeedFan will automatically detect if your hardware is compatible and advanced features are presented. SpeedFan is able to control the fan speed of most fan makes and models, but this will ultimately depend on your motherboard's sensor chip and capabilities. Can SpeedFan control the fan speed of any fan? 'til ya turn blue.SpeedFan is a hardware monitor software that can access temperature sensors, but its main feature is that it can control fan speeds – depending on the capabilities of your sensor chip and your hardware – according to the temperatures inside your PC, thus reducing noise and power consumption. Raised you to be honorable, make a donation and download No one is stopping you from downloading without donatingīut the site runs on the "Honor System". We like it too! This site has been kept alive for 15 yearsīecause of people just like you who download and donate. Like seeing no ads? No misleading/fake download buttons? Read this and then continue to download below. NET 4.8-based version (for older versions of Windows), download here.Ĭlick here to visit the author's website. NET 7-based version (for newer versions of Windows). (NEW) Change the temperature range for finer control over a small rangeĪdd, remove and drag points arround the graphĬopy and paste points from a graph to anotherįine-tune the response with the hysteresis and response time parameters Mix : Use two different curves and apply a mix function (Min, Max, Sum, Average) Target: Temperature based that holds speed until target temperature is reached Linear : Temperature based linear function % will surf until temp is stable at load.
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