Overvolting case fans/CPU fans

[DoomSlayer]

I've been wondering how Linus overvolted his case/CPU fans in this video... https://youtu.be/6hoVDburJ-I

I've done some research and I just can't figure out wth he used. Thanks

[Spec_Ops_Ape]

You could use a very small dc-dc buck transformer, increase the voltage from 12v to 13-14v. You can use these to go the other way to silence the fans or inline resistors to drop the voltage.
8min mark he shows the transformer.

You could probably put more voltage into the dc motors but I am unsure of the upper limit before you burn out the copper windings inside them.

[_I_]

active pfc power supplies can run on 90-220v without problems
higher voltage = lower current and will be slightly more efficient

pc case fans run on upto 12v, maybe upto 18v tops before they will just quit working

better off playing with the fan profiles, set them to 100% all the time for max noise and better airflow and cooling

[Bad 💀 Motha]

Over-voting fans is just dumb. They'll just fail quicker. Where as many could last you the whole life of that PC otherwise. Just manually control all the fans' speeds if that matters to you.

[[☥] - CJ -]

using a fan controller would likely be the easiest way of doing so
but as said, theres really no point in doing so.

[Bad 💀 Motha]

It's sure better then dealing with pwm and bios profiles or software.

[DoomSlayer]

Originally posted by Bad 💀 Motha:

It's sure better then dealing with pwm and bios profiles or software.

You're right, I'm dealing with 5 year old random case fans I had lying around in ancient PCs... Since i really don't care about noise, I'm picking these up...6 of them :)

https://www.amazon.ca/EZDIY-FAB-4000RPM-Cooling-FFC1212DE-Computer/dp/B07GKJ636W

I really don't care about noise (even if these are super loud) my room is around 40c in the summer so I rather have cool hardware, all I gotta do is turn up the volume on my speakers...or get a fan controller

[[☥] - CJ -]

Id get more airflow for the room
Fans will only do so much when the ambient temp is the problem

[Bad 💀 Motha]

Well I never had issues with running my Gaming Desktops all day in a room in summer time while the room temp was around 40-42*C (32-36*C outside) and the PC under full load playing games. No AC in that room and only had one window that could open about 6 inches, I at least had a decent room fan so I wasn't literally melting. Course my PC did have about 9x 120mm fans in it, not counting the gpu or psu.

[DoomSlayer]

Originally posted by Bad 💀 Motha:

Well I never had issues with running my Gaming Desktops all day in a room in summer time while the room temp was around 40-42*C (32-36*C outside) and the PC under full load playing games. No AC in that room and only had one window that could open about 6 inches, I at least had a decent room fan so I wasn't literally melting. Course my PC did have about 9x 120mm fans in it, not counting the gpu or psu.

I have around 6 case fans (3 intake, 3 exhaust) that range from around 700rpms to 1400 rpms...some fans move little to no air and one fan moves a lot of air. I have a 2 old Antec manual speed Molex fans, one cooler master 212 EVO fan, a Corsair fan, and two no name fan which is probably a few years old and moves little to no air...

And then you add in an mediocre case (Corsair Cabride 275R), Ryzen 3800X with stock cooler, and an highly overclocked/overvolted Asus Strix 5700 XT...temps are high on idle even if my room is cold; under 15c. And when my room is 40 to 50c, you can imagine how hot my GPU/CPU gets at idle and in games while I'm literally sweating bricks.

As of right now, lowest temp my CPU hit from just idling on desktop is 49c, highest is 75c. And that's with the CPU fan at 100%.

I had to remove my CPU and GPU overclock otherwise my PC is unstable at these temps. Either it would hard reset or the screen suddenly goes black and the PC immediately reboots (no BSOD).

So, I bought those 4000RPM 200CFM Molex fans, 6 of them. My PC might sound like a jet engine when I install them, but it should help with temps and airflow either way.

These are my current temps, as of right now in my overheating room.
https://imgur.com/a/JIllTfa

[DoomSlayer]

Well, they're installed and they move a crap ton of air and make my PC sound like its taking off flying...

https://www.youtube.com/watch?v=a4hltrQL3U8&feature=youtu.be