Fans connected with this cable spins at maximum RPM unless we change the speed from the BIOS.
#Macs fan control best settings Pc
Depending on the cables attached, the fans on a desktop PC are connected either to the motherboard or the power supply. How Does a Computer Change the Fan Speed?įirst, let’s discuss how a computer controls its fan speed. However, you can control your fan speeds according to your needs using third-party applications or tweaking fan settings on your BIOS. If you are doing some CPU-intensive tasks, your CPU cooler will spin at a higher RPM (Rotations Per Minutes). (Note that this old model of iMac didn't ship with an external thermal sensor taped to the drive, rather it got the temperature info directly from the drive, via a special cable connection).A computer adjusts its fan speed according to the load it gets. Not only does it prevent the fan from running at a crazy speed of 5500 RPM, it lets us fine-tune the temperature we want the drive to be at. So unless your SSD is lying about its SMART temperature data, this app is all you need!įor us with Late 2009 27" iMacs with aftermarket drives, this app is perfect. (Note that this old model of iMac didn't ship with an external thermal sensor taped to the drive, rather it got the temperature info directly from the drive, via a special cable connection). Very nice.įor us with Late 2009 27" iMacs with aftermarket drives, this app is perfect. If the room is quiet, I do notice that the fan is on, but with music playing (even at low volume) I don't hear the fan. This results in a temperature of somewhere between 45 to 55 degrees, with fan speeds around 1200-1400 RPM, depending on how much work the drive is doing, and the ambient room temperature. I have mine set to 1100 RPM 30C and 5500 RPM 70C, because I want to give my drive (a Seagate SSHD) a little extra cooling, while keeping the fan relatively quiet.
Finally, you need to live with this thing - if the fan is too loud, it's not going to be very pleasant to sit near it.
You also don't want to run the fan too fast for extended periods of time, or you risk wearing out the fan's bearings (probably not very likely, but something to consider). You don't want to run the drive so hot that it cooks itself to death after just a year or two. Whether your values of 45C and 70C are good for you depends on several factors, the most important being the manufacturer's recommended operating temperature for your particular SSD (or hard drive). If you set the temperatures too high, your fan will be nice and quiet, but you run the risk of cooking your drive to death. If you set the temperatures too low, your drive will be nice and cool, but your fan will drive you crazy. At temperatures somewhere between 45C and 70C, your fan will spin at some speed between 1100 RPM and 5500 RPM. If the temperature is at or above 70 degrees Celsius, then your fan will spin very fast (and loud) at 5500 RPM. At that speed it's difficult to even hear the fan. If the temperature reported by your drive's SMART data is at or below 45 degrees Celsius, the fan will spin nice and slow at 1100 RPM. In your case with values of 1100 RPM 45C and 5500 RPM 70C, the fan will behave as follows: To answer your question about what 1100 RPM 45C means, it's easier to just explain how the values the lower and upper bounds work. (As I'm sure you've already noticed, setting SSD Fan Control to SMART, followed by a reboot, will also solve this) Now just set the lower temperature bound back to 45 and it will settle down to 1100 RPM again. To fix this and get it back to normal, make sure SMART is selected, then tweak the lower temperature bound to a value lower than your ambient temperature of 38 (for example set it to 30), and wait for the fan to speed up.
#Macs fan control best settings manual
In your case, I'm willing to bet that you have experimented with setting the Manual speed to 1500 RPM at some point in the past. Rather than settling on the 1100 RPM set in the low temperature bound, mine is now stuck on 1300 RPM. In my case, where I had experimented with setting the Manual speed to 1300 in the past, I can reproduce this bug by simply switching from SMART to Auto and back to SMART again. If you play around with the Auto, Manual, and SMART buttons, the app will get "stuck" at the incorrect fan speed (as you show in your screenshot). Unfortunately, you've also gotten a lot of useless answers from our fellow forum users. Great app, but I see you've stumbled across the same bug as me.
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