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SpeedFan 4.50
Copyright 2000-2014 by Alfredo Milani Comparetti
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If you need a tool that can change your computer's fan speeds, read the temperatures of your motherboard and your hard disk, read voltages and fan speeds and check the status of your hard disk using S.M.A.R.T. or SCSI attributes, then you came to the right place. SpeedFan is the software to go. It is fully configurable and you can create custom events to handle every situation automatically. SpeedFan works under Windows 9x, ME, NT, 2000, 2003, XP, Vista, Windows 7 and Windows 8. SpeedFan works under Windows Server 2003, Windows Server 2008 and Windows Server 2012 too. SpeedFan works fine on 64 bit too. The relevant driver is now signed with my digital certificate. And this all costs you absolutely nothing!
Download
The latest version is SpeedFan 4.50. Some tools (like Norton Internet Security or ZoneAlarm) may interfere with the download process. Basically, the REFERER field must be properly sent to SpeedFan's web server. Download won't work if any tool blocks it. For webmasters: if you do not want to mirror the download locally to your website, please link to http://www.almico.com/speedfan.php and not to the direct download as it won't work. Thank you for your cooperation.
What is SpeedFan
SpeedFan lets you take a deeper view at the status of your computer. Almost every computer includes support for hardware monitoring. Accessing digital temperature sensors is really useful. If you are trying to figure out why your PC hangs when under heavy load or after some hours of usage, SpeedFan might help you find the real cause. Very often it is a poor power supply, or an improperly installed heatsink that lead to behaviours that we tend to associate (incorrectly) with errors from the operating system. SpeedFan automatically searches your computer for informative chips: the hardware monitor chips. SpeedFan can display voltages, fan speeds and temperatures. On rare occasions, the BIOS doesn't activate such features. SpeedFan tries to enable them as long as this is a safe thing to do. Not only the motherboard is searched, but also some video cards and almost every currently sold hard disk. SpeedFan can access status info from EIDE, SATA and even SCSI drives, consistently showing internal data that can be used to diagnose current and future hard disk failures. This is known as S.M.A.R.T. (Self-Monitoring Analysis and Reporting Technology). At the lowest level, the SpeedFan hardware monitor software can access digital temperature sensors, but its main feature is its ability to control fan speeds according to the temperatures inside your PC, thus reducing noise.
Disclaimer
SpeedFan is an extremely powerful tool. It can be very useful in helping you find the reasons for an unpredictable reboot or a failing hard disk. It can tell you whether you are likely to experience temperature related issues and can help you to greatly reduce the noise at work or while watching a movie. But this great power requires access to a lot of resources on your motherboard and it might be that your hardware does not like such kind of access. SpeedFan is used worldwide since 2000 and there are so many happy users out there, but you should always remember that no program can be perfect and therefore I can't be held responsible if SpeedFan causes any damage to your system.
A new beta is online!
The motherboards that have been voted to have the best fan control are:
- HP Compaq 085Ch
- ASUS A7V8X-LA (Kelut)
- ABIT IS7-E
- ASUS P5N32-E SLI
- ABIT IC7-G
- SHUTTLE FN41
- ABIT BP6
The hdds that have been voted to be the most silent are:
- SEAGATE ST340014A
- SAMSUNG SAMSUNG SP1614C
- WESTERN DIGITAL WDC WD1600JD-75HBB0
You can rename objects in CONFIGURE using the F2 key.

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