SpeedFan monitors fan speeds, temperatures and voltages in computers with hardware monitor chips. It can even access S.M.A.R.T. info for those hard disks that support this feature and show hard disk temperatures too, if supported. It can even change the FSB on some hardware. At the lowest level, it is a hardware monitor software, but its main feature is that it can control fan speeds according to the temperatures inside your pc, thus reducing noise and power consumption.

What's New in version 4.40:

• improved identification of Winbond W83667HG
• W83667HG has its own support code now
• W83667HG PWM MODE settings now work properly and can be used to change fan speeds
• fixed a minor bug in temperature readings of EMCT03
• fully included data from TPWS002 Intel Document about Tjmax values
• added support for ADP3228 fan reading
• AdvSmart no longer links a drive if SMART data has bad checksums