Why Do Electronics Get Hot?
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- Опубліковано 6 сер 2024
- There's lots of debate over cooling solutions for electronics, but why do they generate so much heat in the first place?
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not gonna lie that transmission into ad was pretty cool xD
a transmission is something you find in cars.
Lucas Dekker that pun was really lit
No he meant to say transistor (pun intended)
Lucas Dekker *segway
yeah the transmission was pretty cool.
2:25 We haven't had a processor with a million transistors in 30 years!
We do have in small electronics
"May our temperatures be low and our frames high"
Hey man ! Could you guys make a video/guide about undervolting laptops cpu ?
Rod Cord it's not always about the power. he might be doing light tasKS and needs more battery life
Rod Cord bs, you can undervolt quite a bit until you hit speed loss.
i've heard you can undervolt if your cpu throttles. that way you actually get BETTER performances by undervolting....
Laptops often do not offer any voltage control, but some kernels for smartphones will allow you to adjust the voltage going to the SOC. If you are willing to put many hours into stability testing, and have an unlocked bootloader, root access, and the right kernel, then you can have a go at undervolting the SOC, and testing for stability. if you have a good chip, you can extend your battery life by a small amount without giving up any performance. The same applies to laptops and desktop PCs, though there is little reason to try it on a desktop PC since battery life is not a concern, and the main reason it would be done there, is if you were going to passively cool it.
The reason for undervolting a laptop is to make it generate less heat by pushing down the core voltage (and probably other voltages as well) as much as possible without having to reduce the clockspeed to maintain stability. By generating less heat, you're less likely to experience thermal throttling, but less heat output especially means less fan noise.
In order to do this you basically do the same thing as when overvolting to push an overclock further - but in the opposite direction.
And by this I mean that you will need a laptop which BIOS supports editing voltages, which sadly isn't that common on laptops.
But if you're lucky to have such laptop, push the voltage down in small increments (-5 mV), then stresstest it for 10-15 min (or more if you want to) using something like Aida64 or similar, then rinse and repeat until failure.
Upon failure, back the voltage up until it's stable. Then fire a stress test for maybe 4 hours or so. If it doesn't fail, well congrats! However still keep in mind that it may still fail even after 2 weeks or so. After 2 weeks, I'd call it stable.
You can also apply the same concept to the CPU Cache Voltage, and the DRAM voltage, all to reduce heat. But in that case, wait until one part is 1-2 weeks stable before moving on to the next part.
The hottest part of my entire rig is my mouse when the RGB LEDs are on :/
GIVE US RGB WATERCOOLING FOR GAMING MICE
you need a cooler for your mouse then
YESSS WATER COOOL THE MOUSE
The Average Pro Only jay does that
Air-cooling the mouse would be way sexier.
i will always remember when while playing modern warfare 2 i looked at my tower and my cpu cooler was still. There was some panic then i realized it was so cold in my room that the cooler just stopped.
Of course the reason those little transistors in your CPU switching on and off takes energy is because the transistors in question are MOSFETs, the same as the big ones on your board, only smaller, and there are literally billions of them. Apart from a small amount of leakage, in modern CMOS technology when they are not changing state they don't actually use power. The gate though, the part that turns it on and off, is inherently somewhat capacitor-like, which means it needs to be charged to switch on, and discharged to switch off. The energy needed to charge that is then wasted as heat, billions of times per second. It's amazing, actually, that these things heat up as little as they do, if you think about it.
About time for this tech tip video. Ive been wanting this for a while. Thanks Linus+
why humans breathe
why humans live
why humans build walls
? why humans englisH
Vaggelis Gradarakis because we need air containing oxygen which our cells use
Why humans sex
The reason why higher clocks raise the Heat is because every clock makes a short circuit. This is because the Fet's(transistors) have a little capacitor at the gate and need some time to change from open to closed. So there is a time where the fet for 1 and for 0 is closed so it shorts to the ground.
i love the way you guys do that transition from actual video topic to advertisement...
Are the stock fans that are included sufficient or do you need a larger fan?
You should have talked about why amplifiers get hot, but don't need coolers and don't get damaged because of the heat. In some cases, the heat it discharges is a good feature, such as for Class A amps.
THAT ending connection tho, nice linus!
Very helpful, Thanks a lot.
great video, as always!
The only component of my rig that stays hot is me when I get those dank headshots 🔥🔥🔥
Now, 5 years later, take a look at what you wrote
@@gamesgamesgames4637 I stand by what I wrote
viewer satisfaction with tech quickie... nice, can't be un-noticed.
2:33 Which SWITCH on & off (Get it?)
hy linus plzzz explain what is the use of scroll lock key on keybord?
ohhh man that transition over to the sponsor at the end prefect semless transition
Great video!
Hey LINUS Ive got a Question -------- How much can you overclock a compter in the coldest place on earth ?, with the computer indoors and using outdoor sub-zero temperature for cooling either by air or liquid system...
Remember guys, this channel is partially meant for technoobs.
do a vid on how to speed up your PC with stuff like disabling the animations and closing background processes
Yay a new techquickie!
resistors don't control current in modern day pc cpu/gpu - voltage regulator module (vrm) do, which are switching type dc buck converter.
Why not make processors higher voltage & lower current to reduce heat, just like how electricity transmission is preferred at higher voltages. This should reduce the heat right?. Or is it that the current silicon based VLSI can manage higher voltages?.
a 1 min add, good job Linus! .-.
How do you find these stock photos? Who makes "egg on cpu cooler" and "holding PS4 with oven gloves" photos?
Explain security tab under properties in explorer win10-7. It's crazy complicated with 20 windows opening one after another
Where can i get that WAN show hoodie? Or is it yet to come out?
@Techquickie Did you re-record "of a few square centimeters"? Why? :)
Gotta love those quickies with Linus.
1:23 is that proper blending i see there, or my eyes see something
If you dont understand, well then
2:11
Aren't those tantalum capacitors, not resistors?
The transition to the add was outstanding..
My old MacBook Pro got stupidly hot during intense use. Shit turned into a stove top on the bottom. Fans also sounded like a plane taking off (this only happened when exporting a 1080p video or something.)
my i5 4460 run without the cpu fan for a month or so and its fine,it was at 90c but benchmark results and usability hasn't changed so i wont complain
It occurs to me how Techquickie is a really good outlet for that unused B-Roll footage Brandon has shot over the years.
if i increase clock speeds but not voltage will the cpu run hotter or not and why?
hey can you explain what is gpu 'rops'
I think there's no background music in this episode.
Somethings different.
And I must say - like it :)
last one is a great idea for your freshbooks adspot on WAN guys
i would like to call processor as zero efficiency part, they radiate all wattage used as heat.
but with an speaker amplifier those can be 90% efficient, converting only 10 of wattage used to heat.
I am going to get an Omen laptop from hp and i am asking this question:Can i run TF2 on ultra with these settings?
CPU:Intel i7-7700HQ
GPU:GTX 1060
FULL HD
Am i able to? Or is it overkill?
WAY TO OVERKILL
Back in the early 2000s I got a computer the maker OCed somewhat... with a stock cooler. Bad things happened.
I liked due to the awesome segway to your add.
could have been the fastest techquikie video ever
at the end of a techquickie/linustechtips video called"How to destroy a phone":
Linus: "...and after you have hit it with a hammer, you could make a website to brag about it's death using Squarespace"!
Can you make a video on how to assemble a workspace PC for photoshop?
My electronics get hot from all my spicy memes
How does a macbook (12 inch) work? It's fanless apparently.
The same way your mobile phone works without one - it doesn't need one
Hey I have a windows 3.0 could u explain that please
what hoodie is that?
I like your unique way of making ads
hi. Please majd a video about hbc ,hbcc. thx
electricity in general gives off heat when there is a really high level of intensity (measured in amps) in a small copper wire. the smaller the wire, the less Amps it can handle.There are reference charts for this.
A single 12V+ rail on an Evga 500b bronze 80+ PSU can provide up to 40 A.
if you think about a 95W cpu on 1.4V, then the cpu is pulling 67 A in total throughout all its internals.... yeah its gonna heat up.
here's a silly thought. could you salvage the internals from a mini fridge or an air conditioner and re route the pipes onto a cpu or gpu heat sink? im thinking you could maybe set it up like a water cooling loop.
the compressor would burn out quickly. they aren't meant to be running for hours nonstop. But good news is you can buy a phase change cpu cooler that is basically an AC unit for your cpu that's meant to run that much.
storm37000 ah, i didn't think of the compressor burning out. i bet it would kill your electric bill too, ty for the phase suggestion
If your child is the size of a heat sink, then you might want to call a doctor.
Dang, you could have talked about superconductors!
Next video idea: Why Linus drops things
I got a question that's been bugging me for a while. In supercomputers which run simulations with complex physics and math involved, they stack cpus with many cores. Why not take the most efficient chip currently available and just make it bigger? Like a motherboard sized cpu,with a motherboard sized cooler etc.Yea it's gonna be huge, but i believe it would increase the physical space efficiency, i.e more cores in less square meters of server cabinets
The reason why they don't do that is that Chips are not manufactured one by one. Instead, they build a big ¨Waffle¨, then cut the individual chips from it. That way, if there's a defect in the waffle (which is almost guaranteed to happen, given the complexity of the process), they don't have to discard the whole thing and start over, but instead just discard the chips made with the defective área.
That means that the bigger the chip, the more of the waffle ends up discarded when a chip turns out defective. Which makes the whole process more expensive.
In your example, we just can't make a chip the size of a motherboard, because we can't manufacture a waffle that has such a continuous área completely free of defects. At least not at a reasonable Price.
Oh, and by the way, the waffles are round while the chips are squared, which means that the larger the square chips, the more of the round waffle gets discarded even if no defects were found.
Another reason is energy efficiency. Inside the chip, current flows through microscopical copper tracks between components, and because Copper is not 100% conductive, current is lost in the form of heat. The longer the track, the more power is lost. And the bigger the chip, the longer those tracks need to be.
Also, thermal dissipation. You need heat to be transferred away form the chip uniformly across its Surface (i.e. avoid ¨hotspots¨ that can damage the chip)That's why chips have a metal cover with high heat conductivity so that heat distributes uniformly across the whole thing . But because just as with copper and electricity, no material is 100% perfectly conductive to heat, the larger the Surface, the more heat will just lump in certain áreas.
And finally, cooling. Let's say you solved all the aformementioned issues and managed to cramp all of that system in a smaller space. That would be a problem, because you're still using more of less the same power, thus generating roughly the same heat, but now the volume of air around your system is much smaller, and there's only so much heat a given volume of air can absorb in a given amount of time.
So to keep your system cool, you'd either need to increase the volume of air in the cooling system at any given time, thus forfeiting any space efficiency gained, or you would need to increase the airflow speed, so that the volume of air gets cycled faster. That means running vents at a faster speed, which would increase noise levels (and remember, noise is wasted energy too) and make those vents more prone to mechanical failure.
And if you're thinking ¨Liquid cooling d'uh¨, remember, you'd still need the exact amount of airflow, because all you've done is replace a heat sink for a radiator. And because your heat source is now the size of a motherboard, that means larger amounts of cooling liquid being circulated at a given time, which means wider pipes, which causes turbulence (fluids don't move at the same speed across a section of pipe: they move faster at the center than near the walls. the wider the pipe, the higher the differences in speed), which means higher pressure to keep the flow going, which means bigger and more powerful pumps, all higher maintenance and more and more energy waste...you get the idea.
Long story short...that's why making huge chips is not such a brilliant idea. Sorry.
Thanks for your time man! That answered my question.
Thanks to you for not complaining about my post being too long to read ;)
@@dorianarbos beautifully explained!
How about limiting the extra power tht goes through the transistors🤔
My pc case is too small so half of my heatsinc sticks out of my case, so now I have a hole cut out at the side of the case to protect the rest of the components.
It's simple AF when you know physics
When a lot of electricty (more intensity than voltage) electrons excite things around where he pass (more voltage is more excited electrons)
And temperature is excited atoms
Then when we OC a cpu for example, it affect the frequency of how fast current pass
(like 5 amps per seconds then oc it could be 9, you understand) and sometimes it affect the voltage
(Like 5.2 GHz 7700k which set it on 1.57 V)
"temperature is excited electrons"
Wrong
Faster clock speeds = more energy used. Why?
Because while the transistors in the chip are in the process of switching between 0 and 1 (the 'transient' state), the power that goes into them is lost as heat, as in this state, they're pretty much just a resistor.
The faster the clock speeds, the more time spent in the transient state.
I'm answering before watching the video: Because of the Joule effect, when you have a current flowing through a conductor the free electrons move stochastically but with a bias in the current's direction, so when the electrons "collide" with a bounded atom some of their kinetic energy is lost and transformed into heat.
After watching the video I'm not surprised that Clausius theorem is invoked, thou it is a somewhat valid explanation thermodynamics is a statistical phenomenon, so while it does tell you that electronics will get hot it won't really tell you why (plus if they are made of superconductors then they won't get hot at all).
an interesting avenue of heat generation is through destruction of information. Due to computers being n0n-reversible, (cant go backwards through an AND gate), information is destroyed, and entropy is increased.
Can't cpus use MOSFET type transistors to be faster? or they already have... this may be a stupid question........
Thermodynamics, whenever I head that word all I think of is the Flanders and Swann song.
I'm looking for creating my web page to promote my tech destruction channel, any advice?
So like normal... Energy cannot be created nor destroyed. However energy can be converted from one form to another such as from kinetic energry to heat and sound energy for example
Lol I love how you tried to mask the mistake made at 3:06. So obvious the audio is from a different source
my PC is soooooooo frustrating!! keeps crashing when gaming. I think the motherboard is overheating, the place I got it from says its fine, friend of the family thinks the graphics card is broke and another source says Windows is the issue!! ;(
I LIKE IT !!!
Transistors are in fact a bit like variable resistors, which explains the heat generation fairly well actually.
No joke. between my 50in tv and my ps4 in my small bedroom, if i play for a few hours and leave on perhaps its on for 4 hours? it heats up the whole room pretty fuckin well by the heat thats being dissipated.
I wonder if ill still be able to heat my bedroom when i move into my condo as its larger. But interesting how much heat is put out. I mean really, heating an entire room within a few hours.
1:05 Pls Linus,I Don't Think Im A Nerd
Good video ;)
Next up: Why Squarespace is so freaking expensive
"Load on your process" 😜😜
one of my friends had a tv that exhausted so much hot air it hurt to put my hand behind the tv
heat can neither be created nor destroyed, only able to transfer.
and man's not hot
Make a video on TPM's
English isn't my first language, and I observed that you spoke quite fast in some of your previous videos before, so I thank you for not doing it in this video :)
Next on TQ: Why does poop smell
3:04 the voice playback to cover a huge mistake?
you are right, the transistors create heat. but if you would like a more specific aspect of a transistor, it's the fact that transistors are not perfect a perfect on off switches. They will have a slight internal resistance that increases with heat. the faster they are switched the less time they have to cool down. The more they heat up the slower they are at changing states, which increases resistance, which then increases power dissipation which increases temperature, so basically a self destructive circle. this is why CPUs will throttle and slow down because the transistors can not simply keep their switching speed.
1kuhny also cpu can throttle down to save energy
What if you make CPU super huge would that cool it faster? (Im not a computer guy just some guy is trying to cool ps4 down)
It will reduce performance and increase latency by a lot.
@@Tyrant_Roach what about main cpus? Like all working together? Thank you fo telling me
@@tkogb4964 Putting more cpus will also cause latency and games don't require many cores in a cpu.
@@Tyrant_Roach thank you for responding and not looken down on my lack of knowledge of this thanks bro
I don’t need a heater in my room during the winter seasons. All I have to do is play a game on my PC.
i think its connect by number of core ... more core in proccessor = minumme of heat
I think linus was mentioning about Techrax at the end of the video 😏
Playing read dead redemption 2 with an og ps4 is the perfect companion for winter
I got an ad with the same guy in it
1:50 is haven😍
Do a video on a watercooling rig for waterproof phones
Pls make an underclocking video
why not use your PC to power your home heating?
Techquicky As Fast As Possible.