I've talked about PWM on the channel a few times, but here's a dedicated video about how it applies to fans, and how it gives us far greater control over fan speed.
I did like this video and it gave me some ideas for my situation. Question for you though. I just built a pc with the Cooler Master H500m on the ASUS Crosshair VIII Hero (Wifi) mobo. The case has 2 200mm DC fans that turn on and off on silent mode like you were talking about. I was thinking of replacing them but now I'm wondering if there's a controller that can treat them like pwm and also make them visible in Fan Xpert 4. Any thoughts on that? Also, why does it seem like 200mm fans don't really come PWM except for Thermaltake but those have a proprietary connector that isn't just a regular PWM fan connector? Confusing stuff... Anyways, appreciate any help you could provide. Thanks!
Some server fans are 4 pin with some of the pins wired a little differently. I've completely forgotten the "standard" they use. I think it was just an annoying OEM rewiring. I was (about 10 or 15 years ago) able to re-pin the server fan to work with out issue on a standard pc motherboard. It was a nice fast dangerous delta fan from memory :D
@@tamaica7770 Stepping up and down voltages is rather easy to do. Stepping up and down current involves more work and other various reasons. More current = more heat for example.
skillet pan heat depends on P=IV. Lets say the fan can work at 6V, and mobo gives it current to operate. Increase current, increase the speed of fan. just not sure how they decided to choose V instead of I. maybe for safety?
4 года назад
Finally - someone explaining it in a way that can be understood
I love how thorough you are about this subject and that everything mentioned is relevant and on track. The only thing I don't like is there is no discussion about the 4 pin molex connector fan type.
Damm! This man is unbelievable! I just wish I had known this channel before. Of the dozens of computer channels I know, this one is by far the best. What a fantastic teaching method! he doesn't need edits, animations or a ton of fancy equipment to perfectly explain a subject. That's talent! Thank you!
Voltage control uses resistance to lower the tension, therefore as a result it consumes more power due to the loss of energy as a form of heat; this makes PWM a power saver. I really liked your channel right away after watching a couple of videos because obviously it is not made for showing off but for teaching purposes, “not too many infos + accuracy at its best = subscribe”. Thank you.
THANK YOU! I bought 2 new fans for an older pc and I did not realize until today that I have 3 pin fans while the sockets on the motherboard are 4 pins. So I was sad that I must send back and buy new ones. You are a lifesaver and your explanations are amazing and easy to understand.
Brilliant explanation, this is so useful in understanding how car radiator fans work and when your ac doesnt work with the fan going into full speed mode!
Nice visual of "pulse width modulation".............. hope folks appreciate the lesson!....................... Nicely done!........................... AJ
I just got back into building PCs again since 2002. This was a great video for clearing some confusion I have with my case fans in my new PC. Thank you.
Video is fantastic, these are found on central heating appliances too, which now have modulating fans and pumps which work via a PWM signal from PCB. Normally heating engineers don't carry oscilloscopes, even cheap ones, so we are reduced to using Hz on a multi-meter.
Realy nice video. I've enjoyed it a lot. Few time ago i've to buy a new processor fan because mine have burned after 6 years of use. I almost bought the 3 pin fan but after some internet research i discovered that processors use pwm (4 pin) fans. Then i bought the right fan for my processor and i am still waiting for it to come. Thanks for nice content. Regards. Rodrigo.
- 3 Pin regulates through the amount of "juice" it sends to the fan. The more power the faster the fan spins. - 4 Pin regulates through timings, for how long the fan is on on end. Pretty simple. Can sum it up in two paragraphs. Great video, well done.
I didn't know whether the fan was driven by the power of PWM signal or not, but now I see the maximum voltage of the PWM line only goes up to about half a volt, so my question is answered. This video is exactly what I was looking for. The power if provided by the 12-volt line and the PWM acts as a sort of relay that switches the 12 volts on and off. Thanks for the video.
Thanks very helpful. Just subscribed. In my new build, currently a work in progress, I decided to use all PWM fans having just switched the original Silverstone 3 pin 180mm case fans for PWM equivalents - also ex Silverstone in a FT02 case. All other fans will be Noctua - I'm awaiting delivery of a new CPU cooler to finalise. Hoping to make it quiet as well as very capable.
Great explain. One video per year watched entirely. I'm serious. I'm going to change my case and wanted to know about the exact difference between those two and I got it. That was really helpful. I watched this for future to what should I choose when I would like to buy two fans for maybe new case. Maybe it will not be necessary. I don't also comment too much videos and give thumbs up but there I should for giving 1:1 all knowledge about fans. Keep it going!
Another beauty of PWM control: I'm a model train enthusiast. My DC trains can run on straight DC or PWM, but using PWM allows the lighting to remain at full brightness, and the sound function at full volume, at any speed. The full voltage is always available for a fraction of the time and is used to charge capacitors to power the accessories. Wall warts / power adapters can be made without heavy, expensive copper windings if they use PWM.
He is right all about what was said about how frequency works. We don't usually say times per second though. But more of how many cycles per second that the pulses are being made. "Cycles per second" or "pulses per second" sounds more straightforward instead of "times per second." Other than that, this is still one of the best educational video for people who would like to learn a little more about their computer fans and learn the differences between DC and PWM.
An excellent video, I just want to add a note, not all motherboard manufacturers are so restrictive like ASUS about the DC fan control, some allow to set the voltage down until the fans stop, even in DC mode. I have four 200mm Cooler Master fans, and the difference between 50% and 60% is VERY audible, in an ASUS motherboard the sound is really annoying at 60% but in my new motherboard I can set the voltage I want in the BIOS, if I remember correctly, I have the fans at 6 or 7 volts at the beginning of “the curve” and the sound difference is really big. It’s a shame that ASUS don’t give the user full control of the fans… That was why I change brand. Still, I really think that this was the best video I’ve watched on the subject, congratulations to the guy with the cool beard.
Great video mate. I was wondering why my 3-pin fan that's plugged to a 4-pin connector is not controllable, checked the bios and turns out its still in PWM mode on that particular fan header. Switched to DC and it finally works. Cheers!
Amazing, the most comprehensive video I have seen on this topic. But what happens if I use a simple pwm fan speed controller in a mix of 3 and 4 pin fans?
Good darn video my friend. the first video which really explains the way it sud be explained. You know what u r talking about bruh. u deserve more views and subs. thank you so much. take that like and sub
Excellent explanation, thank you, I just had one question... Does this mean 3-pin fans use less energy? Or is the consumption similar because a PWM fan is "off" for a certain part of the time rather than just permanently drawing less power? Thank you
