What is a GPU and how does it work? - Gary explains

[@samueltan2148]

I finally understand the purpose of learning Vector and Matrix in Maths at school Lol

[@santiagochris9022]

Instablaster.

[@harshitkumar4760]

Well there are so many things other than computing world where they are used. Actually they are used in every field at the higher level. Yes every possible field.

[@medilyesoudhini7411]

"well...let me explain"..aghh i love that line

[@overpoweredgamer9227]

Expailn? I thought he said Explain* XD

[@medilyesoudhini7411]

+overpowered gamer damn it --" well leave it like that I won't correct it XD

[@xrafter]

@@medilyesoudhini7411 Please no correct it please:( Priss the :

[@iconict2365]

Med Ilyes Oudhini it’s been 4 years and you didn’t correct it

[@medilyesoudhini7411]

@@iconict2365 I was so childish back then 😂 it's corrected now

[@angelotakigami5154]

Gary, your explanations are always great. Congratulations!

[@jebalimazen1809]

Great video Gary thx for your deep explaining!

[@jtomislav]

Congratulations on 2mil subs guys!

[@SulavTimsina]

3M now.

[@jasonk7675]

Nice video, but I lost you half way there. lol

[@lh6355]

Thank you Gary Sims, I understand, what CPU is, What I discovered is that it's using different ways of using graphics and colors, of games etc.

[@atngaming2019]

we need more of these type of videos on how gary explains how all different parts of a smartphone works together for us to be able to game, mail, fb ,whatsapp, etc

[@imraneo]

Excellent video Gary. A good break from the other product reviews. Hope to see more of such videos!

[@christianstefaniw585]

how does the gpu output images to the display?

[@Blo0dyAss]

Still a mystery

[@DaFinkingOrk]

Rasterisation I think. (Disclaimer: I'm no expert!!!!! Could all be wrong!) Not sure if rasterisation is the right word though. But this is what happens. Basically rasterisation is turning the 3d scene into a 2d picture. Very very roughly and basically what happens is it looks at the scene it has created in its memory and takes a picture of it through a virtual camera - which is the screen - then it is sent to the screen. That's all after the GPU has created the 3d scene in its memory. Which it does by creating the polygons/triangles in the memory and then repeatedly editing the memory to add things like textures, lighting, particle effects, reflections/shadows etc. Then the next scene is made by editing the previous one - transforming, re-scaling, rotating etc the verticies like he says in the video - then calculating the lighting and shadows etc again. All that is why the amount of memory and *especially* the speed of the memory matters a lot. When each frame is complete, it is rasterised (or whatever the word is) like I tried to describe above. A "picture" is taken from the viewpoint of the screen, various processing is applied to make it look better and more natural (like AA/anti-aliasing) and it is sent to the output - the screen.

[@tendenzafashion]

@@DaFinkingOrk expert

[@joshuagollaher9614]

RedButtonProductions The 3d scene is mapped to a 2d scene using transformation matrices, then is rasterized and sent to the monitor.

[@jurajbeno2046]

@@DaFinkingOrk wow this is what i came for thanks

[@rednafi]

the intonation of gary's voice is .......I am heading over to the written article.Thanks a lot for breaking it down to lay people.

[@liz_3d]

Great video guys !

[@deez6005]

This was a well put together video. Love your channel. Wish there was a similar channel based on iOS

[@mewantedbyme1]

awesome video Gary!!

[@gc.s]

Congratulations on 2.000.000 Subscribers! :D

[@luca5303]

What does "force GPU rendering" do in the developer options

[@GameDevAcademy]

Vertexes??? Come on Gary! I spend half of each year teaching my students that the plural for vertex is vertices. This video is great and I want to use it in my teaching but you're killing me with this vertexes business!!!

[@Nomad524]

Says here either form is acceptable www.dictionary.com/browse/vertex

[@GameDevAcademy]

+Miller Kavanagh The only thing worse than someone telling you you're wrong is them supporting their argument with an authoritative source. Well, on the plus side I can now get my students to use the video :)

[@matrix-path-of-neo]

in spanish is vertices if it makes you feel better ....

[@mrwho2513]

grammar it's not an exact science, in order to know the real truth you should ask the person who invented this word. There might be no logical conclusion otherwise

[@SuperMasakado]

@@mrwho2513 probably the best comment I've ever found on youtube!

[@thomaslehner7430]

This is a professional and informative video that gives broad insight into the topic in a very short time. Thank you for great content.

[@namanmehta2807]

thanks for the video...can u plz make a video on how one can create their own android custom rom...plz..

[@rutuparna]

What an amazing video! I'm a postgraduate in Computer Science and I had done this in Computational Graphics but you just cleared my concepts amazingly Gary. You rock.

[@learnwithalvin7327]

just liked and subscribed. wish i could do more. i really appreciate the explanation. these are just the details i needed. thank you

[@grindallion3866]

uh... i am quite new in this era but can a good processor ensure us great performance and can i make games and make my videos much better is gpu required for vr gear

[@handsomehorsetech]

definitely would like this series and thanks a lot!

[@veroniquepeeters5232]

Gary is making me smarter with his video's. good video again.

[@kendokaaa]

As always, very informative

[@Singh_Preet57]

Thanks Garry for providing us with the precious information.

[@monkeith5705]

I'm still confuse about the parallel thing in GPU. I have read a journal saying that sphere and cylinder have high computational parallelism. How will you know if a figure is parallel enough for GPU?

[@jagannathbelel]

your explanation is the best love it

[@devmishra4700]

I love your videos. always a thumbs up!

[@parthvsquare7762]

First of all congrats on 2m sub And my question is that what is Xposed And what are custom rom and why are the better than the stock Please explain in the next vedio

[@DarkoSupe]

Just got hammered because, in my video covering shaders (a really dumbed down version), I say that the pixel/fragment shader runs once for each pixel (I was trying to keep it simple). Now seeing this video, I feel better as you did exactly the same :) I guess great minds think alike :) Nice video!

[@JamesRussoMillas]

I was litterally just thinking about this the other day. So glad Gary uploaded it :)

[@baltazar0007]

how does the GPU get instruction. is it hex code that goes or is it zero and 1's like binary code. i mean would it be posibelt to take a nvidia graphics card to make it calculate something just by letting it get commands from a IC chip

[@llennoco]

Each face isn't necessarily a triangle of vertices. Triangles are used to reduce the vertex count but quads offers much better deformation for animation.

[@NikC0b2]

Great explanation !!

[@DaNumba23]

mannn I did a paper on this almost a month ago. Wish you guys did this video sooner 😭

[@Russeljrjs]

How about the Nvidia Tegra X1?

[@dcarrasco2680]

Congratulations on 2 million guys

[@kkoesoemo]

Wow, this episode looks like a Techy thingy online class, love it so much ;) Thanks for the deep explanation btw

[@aakashr2101]

You have made it MORE complicated for some people sir.,

[@AnarchoTak]

69 likes noiice

[@gurneetsingh7952]

It's been four years, is it still complicated for you?

[@jtk6402]

@@gurneetsingh7952 😂😂😂😂

[@gianmarcopane2806]

Great explanation, thanks a lot :D

[@RiteshKudalkar]

Gary definitely has those amazing explainatory skills! I'd love to see more such type of videos

[@shubhamraturi3348]

Hi Gary , I have only one problem that you never reviewed a Micormax smartphone? why ???????????

[@TechStache]

Great video! Very complete! btw, at 9:15 , that's Unreal Engine, if i'm right.

[@ashishsharma8383]

i wish i had a teacher like Gary Sims..... your explanations are so understandable... and also i dog the accent.

[@TheONEHD1762]

thanks a lot. a very good explaination

[@mattizzle81]

I love shaders in OpenGL. They are such a powerful tool that are often neglected for some tasks where they just blow away anything that can be done on CPU. Image processing, etc. For example I tried making a 3D scanning app on Android. In Java it was too slow to be practical. In C++ it was somwhat ok but still only 1 frame per second to build a 3D point cloud. Moving pretty much the same code from C++ to GLSL shaders results in an insane speedup sometimes, without much change required since GLSL is so close to C, it is almost just copy and paste. In one instance, the same code that was 19 seconds per frame on a powerful Desktop CPU runs at 30+FPS on a mobile GPU. Just cuts through those calculations like it is nothing. I've been fascinated ever since on what can be done with shaders.

[@mskumar999]

Awesome clarity !

[@KantoKairyu]

Wait wait wait, you're telling me it's *not* a home for a kindly elf who eats polygons???

[@Medieval3d3d]

Thank you Gary, finally someone explained me that, seriously I always wanted to know :)

[@radtech246]

Gary videos >>>

[@naorzamir6346]

Great explanation, Thanks!

[@hetherdane9479]

Thanks for the video and all but I'm tech fried. Will this external GPU will render my video? I have video pad editor (basically like Sony Vegas but I think better hehe) the program basically saying it's too much stuff going on for it to be rendered in real time. I really need to know if this helps with that :)

[@Andre-xu9st]

Thanks Gary!

[@CarlosHernandez-sd9ws]

I just bought a new gaming pc. it has an i7 6700k cpu and a GTX 960 2gb. 2tb. 16gb ram. etc. when i play overwatch its says on the video sertings . intel hd 540 graphics. does this mean my gpu isnt working for some reason?i dont get the frames that i expected from other games too. plz help?

[@killertruth186]

congrats on 2 million subs.

[@psychoticguardianismael3967]

thanks for the explanation.

[@mohdasim7859]

thanks Gary for explaining this 😁

[@JP-sn7cd]

Is there a CPU video like this?

[@mdjaberhossain7387]

Thanks a lot sir.This video is so helpful

[@Unreelness]

love your videos Gary.

[@riteshgarg]

Gary always rocks :)

[@GoddardEmpire]

So wait, the Vulcan thing, what is it? I'm aware of it being an improvement but I didn't really understand if it was hardware or software?

[@GarySims]

Software, like OpenGL or DirectX.

[@GoddardEmpire]

+Gary Sims Thanks!

[@blutskopp]

Which game is he showing at 6:46? Nice vid BTW!

[@blutskopp]

Nvm, dumb question, found it in the video

[@emrekonak3114]

Thnx for The information

[@soomjeetsahoo8710]

but gary u said CPU do have somthing called ILP... So how its not parallel?

[@entertextimagebelow]

Is there an english version?

[@marcusalexio1834]

Wow this is awesome. Recently I got interested in building my own PC. So naturally I got interested in what each individual part does. It's really fascinating how they all work to create an artificial world. Really good explanation, even though I didn't understand everything 100%

[@awaisahmed9418]

Great stuff Gary

[@majedaleisa]

which s7 did you mean sn820?

[@AbhijitBiswasDBZ]

+Gary Sims: can you please explain alu number vs GFLOPS? please

[@TonyCorin]

I'd love a 2 GPU's in my car.

[@sjesudasan]

Hi Gary, Great video as always. can you please clarify my doubt, once android N is released to older devices running multiple cores, will the graphics performance improve on supported games and benchmarks?

[@vanyaa104]

yes it will, vulcan api will help

[@yvanbrunel9734]

Excuse Me Sir. but i wish to know : Google Nexus 6 Runs(operating on API Vulkan) but its GPU and CPU is Adreno 420 and Qualcomm Snapdragon 805 respectively....And the Motorola Moto X(rumored by Motorola to receive android N Updates) Has Adreno 320. So My question is as follows since according to your explaination Gpu are Meant for Trigonometric operations, How is it possible for The Moto X to be able to receive the update(implying the most advanced API) but the LG Nexus 4 also having an Adreno 320 can't(moreoverm the both have the same amount of RAM)....Why can Nexus 6 and Moto X have Operate On API Vulkan but Nexus 4 can't?

[@botakleong788]

tq Gary for the explanation, appreciate it! keep it up

[@karanchawla8954]

believe me garry i have learned mostly from you Thanks keep doing it

[@ciencieiii2969]

Im more interesed about how gpu use this values to make a picture (comunication to monitor)

[@xrafter]

Heard of window manager? It a software program that give every graphics app its own window.

[@arandomguynamedlars8943]

Can you also make "a what is a CPU" video?

[@xoqes]

Gary is the reason why I am still a AA subscriber. Gary and Jayce, the rest of the team are pretty much good video makers with a clear lack of enough knowldege to be hosting a tech channel. But then again, most of the most subscribed youtube tech channels are like this: good video making, almost zero quality content.

[@BMWROYAL]

So my math teacher couldn't explain why we need geometry but you did, what a world we live in

[@laskaralam9119]

What about VRam?

[@hanan1933]

great video #GARY please do indepth cpu & gpu

[@taraf109]

Gary is the Wendell of Android Authority!

[@dtb6456]

wich is better nexus 6p or Xperia z5 premium?

[@SiamAlamOfficial]

Nexus 6P

[@hanan1933]

thumbs up #gary, please do indepth cpu & gpu video. (fully explained)

[@sanjeevaher2458]

While i play a game if the GPU is working so hard then what is the CPU doing?

[@TapanThakur1964]

My GPU is bad in maths. He is of my type. #mygpuislikeme

[@veselindekov2055]

Gary is the best, I would've loved to see more videos from him!

[@moseleenone7252]

So, is the purpose of gpu to form the 3d graphics we see on the screen? I'm still fking confused

[@CarlmeisterWasTaken]

nice background... must be a GS fan

[@mishalahammed5850]

This video cured my insomnia.

[@tendenzafashion]

after watching 3 times i understood;thx

[@imranhq13]

which gpu is better mali or adreno? i personally prefer mali

[@RainBow-kz9mi]

what happens if I enable msaa 4x.

[@futtspoppin6348]

Now I’ll go see if there’s a video that explains this explanation

[@CyborgSodaCollects]

Gary for greatest tech guru

[@SyangjaliThitoMagar]

nicely explained

[@jasonk7675]

Is android's answer to metal API from apple Vulkan API?

[@Isaax]

No? Vulkan is not just for Android genius and it wasnt made specifically for android

[@jasonk7675]

I know, but it certainly is a step up for android from OpenGL.

[@Isaax]

+Jason Khoo Yeah thats true

[@Kepe]

Kind of. Vulkan is a universal API that isn't restricted to a certain operating system or hardware. So it can be used on phones, tablets, computers and so on (but it does have some hardware requirements, so don't expect to get Vulkan support on older phones). Vulkan is actually based on AMD's Mantle API, and is developed by the Khronos Group, which is also responsible for OpenGL.

[@darvs]

Does mali t760 support vulcan api?

[@GarySims]

No, not at the moment... however there is no technical reason why it shouldn't, it just a case of drivers. But most OEMs will be looking to add Vulkan support to new devices not older ones.

[@xceeder]

+Gary Sims You are the man , Gary.....

[@coooldudedar1994]

Thank you AA for making videos like these.....definitly very helpful!!!!! Do keep making more of these!!!