Download SpeedFan 4.13

On the site of Alfredo Milani Comparetti, the creator of the Speedfan program, Jack Flushell found version 4.13 of SpeedFan. It is a small program with which the measured temperature and voltage of various sensors can be read. It is also possible, if the motherboard used supports this, to adjust the speed of your fans. The changelog announces the following changes:

INFO: it looks like under extreme circumstances, SpeedFan could hurt the monitor connected to an nVidia Video Card. This happened only while doing a SEND REPORT. For this reason, version 4.13 was written. Version 4.13 greatly improves nVidia Video Card support, makes sure that some, possibly offending, checks are no longer done and COMPLETELY REMOVES NVIDIA VIDEO CARD support in SEND REPORT. You can safely use the SEND REPORT facility from version 4.13 on. This is the first serious, yet very rare to happen, issue ever reported for SpeedFan.

• SEND REPORT no longer scans nVidia Video Cards
• enabled NVIDIA video cards support after resume
• added support for WORD READs to nVidia I2C, thus detecting available LM75 sensors on that BUS
• added support for GeForce Ti 4400
• a bug tracking system is available at
• added detection for LPC47M172
• handled the inverse logic for PWM in LPC47M192
• less debug messages are issued when problems are detected accessing the SMBus
• made the LM75, AD7416, AD7417 temperature reading compatible with the higher resolution of the DS75
• no longer probed for DDC monitors
• removed WINBOND CLOCKS checking
• GL525SM check is now done only at $2D