SpeedFan
SpeedFan - a small application that shows you fan speed, voltage and chip temerature

The main viewing purpose of SpeedFan is to show its user what's really going in their machine When minimized, a temperature reading is showed on the button right of the desktop When Speedfan is in an open window you can see a whole lot more From Fan speed to total voltage, you can view any and all of the current fans

Here are some key features of SpeedFan

handle almost any number of South Bridges
handle almost any number of hardware monitor chips
handle almost any number of temperature readings
handle almost any number of voltage readings
handle almost any number of fan speed readings
handle almost any number of PWMs



First of all, you have to identify which temperature sensor is which SpeedFan strictly adheres to available datasheets for each sensor chip Please remember that hardware monitors are chips that do have some pins small connectors which should be connected to some additional hardware temperature probes, thermistors or thermocouples in order to be able to read temperatures

Only a few hardware monitor chips do label their connectors with CPU, System and the like Most of them use labels like Temp1, Local or Remote The hardware manufacturers connect available pins to different temperature sensors basically according to the physical placement of components on the motherboard

This means that the same chip, an ITE IT8712F, for example, might be connected to a sensor diode measuring CPU temperature on Temp2 and, on a different hardware, it might be connected on Temp1 If you have a Local sensor and a Remote labeled one, this usually means that Local is the temperature of the monitor chip itself and Remote is the temperature read from a remote probe

When you have properly identified which temperature sensor is which, try to lower the speed of each fan and look at reported speed and temperatures If you do not allow SpeedFan to change any fan speed and set all the speeds too low, then SpeedFan won't be able to avoid overheating


What's New in This Release

completely rewritten the detection and the identification strategy of ITE IT871xF chips fan readings are now ok
xAP support is now properly reenabled between sessions
fixed context sensitive help F1 key on Windows Vista
enabled, if needed, the SMBus on Intel ICH7 and ICH8-M
added several checks to CPU usage routines, fixing a nasty issue where an error window appeared once every second
added full support for ATI SB600 SMBus
added full support for Intel ICH9 SMBus
added full support for nVidia MCP55 SMBus
added sull support for ADT7475
added nVidia Control Panel access to read video card temperatures
supported the IT8716F and the IT8718F hardware monitor at unusual addresses
added some SMB scan exceptions for Compal 08A0
SMBus address $15 no longer scanned on AOpen i975Xa-YDG
fixed an issue that caused the DFI LP UT NF4 SLI-DR Venus to power off on program start
added support for Fintek F71872F voltage readings
IT8712F-J now uses two undocumented FAN DIVs
speeded up Asus M2N32-SLI DELUXE program startup
added detection of an unknown Fintek chip to avoid false detection of other sensors at the same address
W83627EHF and W83627DHG now properly show SMARTFAN III in CONFIGURE / ADVANCED
W83627EHF and W83627DHG can now change PWM TYPE from PWM to DC in CONFIGURE / ADVANCED
fixed FAN DIVISOR settings for Winbond W83791D
added PWM OUT BASE CLOCK selection for WINBOND W83627DHG, W83627EHF and W83627EHG
warning temperature can now be set as high as 125C in CONFIGURE