Transient Response of Motherboard and GPU VRMs R0.4

[@ActuallyHardcoreOverclocking]

Well hopefully this is good enough.

[@skoopsro7656]

you always explain topics quite well.

[@ActuallyHardcoreOverclocking]

@@skoopsro7656 most of them aren't this far in the deep end.

[@supra9301]

I think you do a great job explaining things, I learn more here than any other channel! looking forward to the load line vid

[@float32]

I’ve always wanted to try setting up a CPU load cycle and sweep its frequency, but I’ve never had the guts to verify the loop stability of the VRMs.

[@Another_throwaway]

A really helpful video. I was taught "the easiest things to learn are too simple to be realistic" so when you explain why you have dumbed things down and what they are more like in the real world helps a lot.

[@Sessym]

This reminded me why I loved learning about electronics. There's always more detail :)

[@evocatiproductions]

Another Buildzoid Class! I live for these!

[@penguinton7691]

Favorite buildzoid videos I always look forward to these. Can't wait for the video about improvements to transient response.

[@LadyEmilyNyx]

TIL. Really interesting stuff, thank you. I'd never really thought about how the power system might work before, and this really gave me a lot of helpful knowledge.

[@joek81981]

There was a character on SNL named Nicholas Fehn. One of the best bits they ever did. Buildzoid reminds me of him at like 40%. Love your uploads, my man.

[@fabiofantini2759]

This explanation Is Crystal clear, and helped me a lot figuring out how to resolve the vdroop affecting some of my old motherboard. Thanks a lot, this video Will educate and help and it's Very Very Easy to follow-up.

[@JP_Stone]

I love your videos then again this stuff fascinates me. Thanks Buildzoid and stay well.

[@shaneeslick]

G'day Buildzoid, You really underrate yourself as a Teacher, I have learnt so much from you as you do a Awesome job of simplifying "How it works" for us who just want a bit better understanding of what is happening, I now have a spare Motherboard & GPU without heatsink so I can look at them while following your videos like this one with drawings to see how they translate to a motherboard, I found your channel after seeing a Breakdown you did for G/N & have enjoyed all your videos since, they are great to watch with a Cup of Tea & a snack 😁☕🍪, P.s. You & Anthony from LTT have great Story Telling voices 🥰

[@tetsurobashchan543]

This is one of the best if not theeee best channels for introducing the complex inner workings of hardware etc to beginners. Thank you!

[@yadtahir9443]

Absolutely fantastic video; I am not in to EE at all, but I can keep up with this vid easily. Thank you for the hard work.

[@sashko14]

Great work, thank you for the video buildzoid! It was really informative and easy to follow along. Would have loved if there was a quick overview of the PWM lines and the function of the high-side and low-side MOSFETs. I understand they have more to do with how a buck converter works than transient response, but it would have made the explanations even clearer. Can't wait for the next video!

[@StitchExperiment626]

There was already a video in the past, maybe that would have answered your questions :D

[@albireo8166]

choke is a shorthand for chokeinductors that 'choke' the highfrequencies out of an electrical signal

[@expert3iii]

I love this stuff. It brought me back to my high school days in vo-tech classes. The more indepth you go the better :-)

[@mattcobb3410]

This is so much more interesting than online school and probably more useful

[@brovid-19]

"if you Google choke, it's gonna give you a hard time" - best buildzoid quote ever

[@shibasss]

Thanks for easy explanation! This video was very helpful for my almost zero level of knowledge. Now I understand better why you love sticking capacitors everywhere.

[@tommihommi1]

we need a "MOAR CAPACITORS" Shirt in addition to "keep calm and raise vcore"

[@StitchExperiment626]

What about "We need better capacitors!" ? They also improve everything :D

[@abewang6829]

Man this is the best kind of content so sad to see not many people care about watch this. It took me a while to find this because when I just randomly reading your playlist I don't know what a transient response is and thus don't pay attention. I think you might want to classify this kind of content with a title like "BZ explaining" or something so people can know that this explains something important.

[@alanestevez2431]

You are way better than any electronic teacher (idk how is it called)

[@LecoSilvaPoesia]

Great lesson!!! 🙏 I still have some doubts regarding undershoot, tho... Does it mean that while overshoot may - with time - degrade the CPU (when, how long, I got that it is uncertain and the mobo has a lot to do with it), undershoot only downside would be the instability or even impossibility to reach a certain frequency? I'm messing with offset voltage on a Z390 Aorus Ultra and I was able to reach 5.1GHz using -0,055 but the min-max difference in VR VOUT readings is massive, something like 0,145 but never higher than 1.35 and something like 1.29 under load. If the spike isn't high enough to do any damage and the undershoot isn't destabilizing my overclock, it just isn't something to worry? 🤔🤔🤔🤔🤔🤔 Great lessons, bigger questions 😬

[@samfedorka5629]

3:23 regarding choke/inductor. Back in the day they used to call capacitors "condensers" which really threw me for a loop until I looked it up. 5:05 "high pulses on the PWM line" It looks like you've drawn the pulses on the high side mosfet specifically. I'm more familiar with 2 phase buck regulators that have integrated drivers, but I had some questions regarding your PWM. Firstly, I'd like to know more about the controllers that can turn on phase 1 "out of phase" like that (at the same time as phase 2). Do you know of any offhand (that have a public datasheet I can look at) I'd like to learn more about how they manage it. It looks like your PWM signal is showing a pulse skipping mode. I know this is done for high efficiency at very light loads. In a traditional "continuous" mode, the controller will usually leave the low side mosfet on during a "load to idle" transient, allowing current in the inductor to reverse, and dumping the extra energy out of the low side mosfet. The buck regulator controllers that I use don't allow reverse current through the inductor in pulse skipping mode, which means they have more overshoot, but better efficiency. Do all the MB/GPU VRM controllers do pulse skipping mode for high efficiency at low loads? Is there a way to run it in continuous mode to help with the overshoot? I know they usually turn on the low side mosfet until the inductor current is about to reverse (in low load) or at the beginning of the next cycle (for mid and high load) regardless of if they operate in continuous or pulse skipping mode. The video is a good introduction to the topic, especially with the role of the inductors. I watched it twice and I'd be happy to share it with others.

[@Michael-su7ip]

What software monitoring would you recommend for general purpose temperature monitoring other than hardware monitor since you said it was bad at around 27:30

[@ActuallyHardcoreOverclocking]

HWinfo

[@zdziseq]

BZ are you gonna show how to use USB0005 to "correct/fix" some options in IRxxxx controlers?

[@georgeindestructible]

I am not a simple man, but when i see a BZ video, the like button presses itself, as if it was magic.

[@MissedMessages]

Thank you bro. I feel a little less uneducated now

[@matapk2]

LOVE IT

[@bobiseverywhere]

what I don't understand is why not have a comm signal from the cpu to the voltage controller, maybe linked with the scheduler maybe to then almost remove undershoot. better control of power and allot less of this messy dummy system that can only respond to things already going wrong basically. why continue to do things this way when the mobo has to be made specifically for the cpu it is going to support anyways. would it really make things that much more complex or costly? I kinda understand the cpu does not know ahead of time what it is going to be given, but for the time difference to have a subsystem see that demand is coming and possibly for how long would be highly beneficial right? then it could give the voltage controller a better idea of what to output, when and how long on the MOSFETs. same for overshoot as it would be able to ramp things down sooner as it would have information on the decrease in demand.

[@henrikandersen4777]

Thanks- so i got a issue, i had a fan die on my RTX 2080 i bought a new fan from asus changed it and then the pc could not find the card, i tried whit another main card also to get into windows but it could not find anything just the older card. got any thoughts on what i could do to troubleshoot this. asus said warranty wont cover anymore.

[@davidpinheiro5295]

Hey, my Asus motherboard has an LLC setting and then IA AC LL and IA DC LL. Whats the difference between these and the purpose of each? Also, I believe your scenarios use manual voltage, how does all this change when using an adaptive mode? Thanks and sorry if any of these questions do not make scene, kinda new to all this.

[@riekje321]

Great video. Still trying to make sense of Sabertooth Z87 motherboard i7 4770K overclocking... I do wander why HWmonitor is so bad in your opinion.

[@StitchExperiment626]

I think its because HWMonitor does things by itself. And its slow, unprecise, und often throws misleading "measuments" to your screen...

[@Michael-OBrien]

There’s probably some low pass filtering when monitoring voltages

[@brianmccullough4578]

So more/bigger capacitors the merrier?

[@rufioh]

I’m really curious, what’s your average watch time for a video? I feel like it should be quite high, because of how specific your content is, but idk

[@StitchExperiment626]

Agree.

[@deihmanftw3056]

This is probably the most use I’m going to get out of my A+ in PH 102

[@Razor2048]

I wonder, why don't the motherboard makers seem to want to add heatsinks to the VRMs supplying power to the RAM?

[@ActuallyHardcoreOverclocking]

because it's pointless. Since those VRMs don't produce much heat.

[@Modna89]

Once our load comes in, shouldn't the PWM pulses be longer? (~10 times longer?)

[@brovid-19]

for some reason, i would really like it if someone did a "buildzoid animated" series. "The cpu does whatever it wants.." cpu just has a derp face and sprouts legs and starts knocking things off shelves and vrm walks in all SMH cuz cpu sitting on the kitchen floor surrounded in broken stuff licking the wall or something. I dont' know why im visualizing shit like that when he describes electronics, maybe if i started doing drugs It'd would bring me full circle to normalcy.

[@bogartwilley]

5 Dislikes you say?... Hmmm Clearly 5 people didn't pay attention & blew up their CPU

[@teddygoboom1]

I have a weird mobo use case. Ive been wanting to see how far I can push ryzen single core/ccx and order a 3600x or 3800x. I want to get a mobo with as many phases as possible without spending $500, especially as I plan on frankensteining it. any suggestions anybody?

[@alien_man1669]

I just want to know what frequency I can hit with 1.21 gigawatts!

[@SonGoku-97]

your good at explaining things in a simple way. BZ for dummies series lol

[@MM-pt6hy]

Great

[@TurboD16z6]

i need to go learn volt amp and watt first before watching this. i have no idea what 10a means. is that alot? is that bad ? no ideal what 90amp means. or 60 amp means. all i know is higher is better. thats it.. then i'll come back and watch this. i need to go learn basic computer building basic 101.

[@v3xx3r]

I follow almost everything but if you tested me on it I couldn't answer a single question.

[@brianmccullough4578]

I agree with the other people, this was very informative,to noob to this stuff anyways!

[@stefanogrillo6040]

coil = bobbin = choke = inductor = inductance

[@walek92SFC]

Well yes, but actually no... Bobbin is specifically the plastic holder the coil is wound on and i've never heard anyone refer to an inductor as bobbin. And technically choke is referring to a specific usecase of inductors, for example balun transformers (converting a signal+ground signal into a differential pair or v/v) shouldn't technically be called chokes, and they usually are inductors. Just like the inductors in switchmode power supplies can but don't have to be chokes, a buck converter has a choke sure but for example isolated flyback? It's a coupled inductor, sometimes called a flyback transformer which is also arguably incorrect, but definitely shouldn't be called a choke. At least imo.

[@misomalu]

I think you’re a little too hard on yourself. This video may have skipped a lot of detail, but you covered the essentials of what we need to know. It’s really important to have these videos that act as a primer for these complicated topics. In fact, you would probably lose most us if you went though every detail. Teaching is about building blocks - you’ve just laid the foundation for us to understand all of the complicated stuff that you skipped over, should you decide to do another video on this.

[@masochisticcooking7078]

Time to make it with bjts on a breadboard

[@drcpaintball]

30 minutes of charlatan rambling his superficial knowledge to impress youtube laymen

[@CAfakmykak]

30 minutes of incoherent babbling from my favorite overclocker? Ok

[@autumn5592]

No better way to spend my evenings. B^)

[@deminybs]

Hi (: