The Sneaky Thing About PCI Express - CPU vs. Chipset
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- čas přidán 29. 11. 2020
- Check out the SteelSeries Aerox 3 Wireless at steelseries.com/aerox?...
Learn about why all PCI Express lanes aren't the same.
Leave a reply with your requests for future episodes, or tweet them here: / jmart604
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Some video suggestions:
1: Can y'all do like an in-depth video of how a browser works? Like how Chrome and Edge use Chromium?
2: How updates are executed on operating systems?
3: How is a software "optimized" to run on certain CPU architectures?
as a computer science student about to graduate in 2021, i'd love to finally learn how to optimize software for different architectures xD should really have been taught to us already... but if education fails, Linus is here to save the day... pls...
I wanna see these too!!
These are nice suggestions.
You just gave me 3 nice ideas for my own vidzs😁
1 ) Chromium is the engine that translates basic stuff (HTML, CSS, JS etc) into a working webpage. It contains all the parts you need to run your car. The browsers are simply "extra features" and they often add tricks to either speed up the translation of the above named things (by caching it or trying to predict stuff) and gives the browser creator the ability to inject stuff into the chromium engine -- So, add-ons. With a car this could be bouncers for example. Basically, it allows them to mod the car.
2 ) Operating systems are just very complicated programs that get started up by a tiny command on what used to be your Master Boot Record, but I guess the UEFI is smart enough to find OS's now. An update is not much different from updating a website or app in the sense that there are certain things you can update while the user is looking at it, and certain things you have to reload the website (restart the OS) for. An update basically just overwrites older files or adds some. It's not that complicated, really...
3 ) In deep-level programming, the developer can decide what types of commands to send to the CPU. The developer can decide how much memory to allocate, how much stuff to remember, what exactly to remember, etc etc... Intel and AMD cpu's have different ways of handling commands. They are, much like browsers, trying to be "smart". CPU's haven't really gotten much faster in hardware speed (MHZ) as you may have noticed the past 10 years. However, their performance keeps increasing; This is because of what they call the 'architecture', which basically means a tiny software layer which translates stuff into tasks for the CPU. We call this firmware. This, mch like the browsers in point 1, tries to predict stuff. Some CPU's do less but faster cycles (in the old days this was intel) where as some do slower cycles but with more calculations within said cycle (AMD in old days). This means any command has to "wait" until the previous cycle is done, but starting up a new one also costs time. So if you put a lot of calculations in one cycle as the developer, the slow-cycle one might handle it faster as you use the slow cycle to do more calculations. If you do a lot of small calculations instead, the smaller cycle will win because it's faster. ARM is basically a CPU without intelligence, meaning whatever the CPU does has to be software-managed, but it does save a lot of overhead as the CPU doesn't have to "think" before executing what you tell it to execute.
Now that you've read all this, I have to admit to you that I have no idea what I'm talking about at all and probably not even half of what I said is true.
Well done they are all interesting subjects 👍
This is the kind of video that I want to see more on Techquickie!
What other kind of videos are there on Techquickie?
@@caliqm2199 aPple arE beHind
APple CompuTers r ovErpriceD
Couldn’t agree more. We already know Apple products are inferior 😌
@@ToadyEN are u ok man?
LMGS videos are getting better
PCI express: the future of trains
I like trains
I like cookies
Pci express express?
@@KL-tn1xcyeah lol
Pcie bread: the future of bread
The Sneaky Thing About PCI Express
......It works just fine if it's not dropped
btw between 2080 TI second hand @ $810 or Zotac twin edge oc 3070 new with warranty @ $720 3070 better right? They both pretty same in 4k and 2k, right?
@@GamersGuard i would defo choose 3070. is newer, cheaper and perfomance is the same. only struggle is stock
Crap, it's not Linus proof.
@@GamersGuard unless you need it right now, I would wait for prices to settle down. The 3070's price will drop back to MSRP after the holidays most likely. But yes, the 3070 should be equivalent or better in everything except VRAM.
@@hudsonr.218 already getting it so.. -) in this country prices remain higher on such parts even ex generation still $200 more expensive....
So what vram beenfit in 2080 TI vs 3070?
Linus: "This is why you shouldn't have mice with holes in them"
Also Linus: check out this sponsor today
I think it's pretty clear that sponsorships are not actually recommendations, although I don't think they'll do sponsor spots for anything genuinely terrible.
Came here to say that. And I'm pretty sure he trashes wireless too. All well tho, just a sponsor. But me personally I wouldn't have contradicted myself so close together
I'm guessing your not a gamers nexus subscriber. They roast their sponsors....
i mean he doesnt like the mice with holes but he knows its prefrence and that some people will like them an that they need the small weight
@@tyklie01 I don't think he does trash wireless, at least not recently. I saw a video not long ago where he tested Logitech and Corsair gaming mice and their latency was on par with the wired counterparts and even much better than a cheap wired one
Free Tech Tip: If you have connected a lot of stuff (multiple M2 SSDs etc.) to your Mainboard and you want to find out if it hurts your GPU link, fire up GPU-Z and check the "Bus Interface" information. It should say @ x16. If it says @ x 8 then your GPU is sharing lanes with something else. This could be a reason for some performance loss on GPU side.
You're welcome :)
Only the number behind the @? My Bus Interface say "PCIe x16 3.0 @x8 3.0
@@bobbymois This means your GPU sits in a x16 slot, but it's only addressed with 8 lanes of PCIe 3.0
So maybe you have 2 nvme drives or other cards plugged in that take resources.
A lot of mainboards have an overview about what shares which lanes. Maybe take a look at that.
@@knightnevermore i changed my gpu to the pcie slot right under the CPU, now gpu-z says @x16
thanks for the tip☺
Good tip. I just found out you might need to run the test from the "?" to get an accurate result though, because GPUs can shut off lanes/speeds. Mine did. A 1050ti, it said x8 x1.1 or something, after using the stress test its 8x 3.0. I think a 1050ti cant even use 16x anyway.
@@Lloyd.B. Nice sub-tip. The same thing happens with RTX 3080 - shows x16 1.1 a after running the render from the "?" it immediately changes to x16 4.0.
Where is part four of the secret shopper series on LTT
Linus broke all of them.
@@dustinthompson4963 No, he DROPPED all of them
What about the apple MacBook m1 review?
Is there going to be a new scrapyard wars?
Wait they made parts 2 and 3?
2:41 I think the last 16x physical slot (4x electrical) is actually going to the chipset
You are correct (at least in all mobos I'm familiar with).
that's why u should check ur manual, some mobos have 3 x16 electrical, others 2x16, and then some 2x16 and 1x4, if its x4 its for the chipset
@@arencorparencorp2189 Wouldn't that require more PCIe lanes? Is it just for stuff like Threadripper?
@@lukedk4614 Yes.
Most boards have 1x16 or 2x8. Most boards that have 3 16 slots are 2x8 + 1x4 connected via chipset. Aren is talking about high end (HEDT) parts. With Crossfire and SLI being basically dead, 1x16 is more than enough for the vast majority of us graphics wise, although I suspect AMD and Intel will eventually move to 24, 28 or 32 non-southbridge lanes so as to support more NVMe direct to CPU.
@@lukedk4614 yes, it is, the board with x3 or more electrical x16 slots is tr or hedt intel, but there r some exceptions for normal 16 lane cpus of 3 electricals, 1 of em directed to chipset (to store a 4 ssd raid or stuff like that)
I've been wondering about this for 3 years now and I couldn't find a video explaining it in simple terms. Thank you so much!! :)
"Can you hear the static?"
_holds it directly beside the motherboard_
The dislikes are from people who modded their GPUs to fit in a 1x slot
I have a box of hacked up cards I use for when I need the 16x slot for something more critical like a storage controller.
@@geofrancis2001 why hack up the card? it feels a bit easier to cut the stop out of the slot, you see that on a lot of server boards just no block at the end preventing you from inserting a bigger thing. Plus nVidia made some 1x quadros and gt710s for you there if graphics isn't critical for the application...
@@RandarTheBarbarian low end graphics cards can be found for peanuts on ebay, and its much easier to saw a little bit of fibreglass off the end of the graphics card than cut the end off the slot without damaging the contacts on a much more expensive motherboard. they are all low end cards like gt610, hd5450, hd 6450, so trimming them to a 1x slot isnt going to effect their performance, they still work in 16x slots without any issue.
Nope. Just a boring video with bait style title
There are cheap risers for this purpose, since miners hook up lots of GPUs and don't need the bandwidth as much.
3:57 Aussie road works signs. I can't even escape them on the internet.
I noticed it too but can't pick the location, palm trees and art Deco multi story building I'd say Gold Coast but it may be Sydney.
How is this Aussie? It's not upside down
Yaaas, great video! I’ve missed vids like these... helping the novice pc builder! Thank you!
This answered so many questions ive had since I built my first computer🤦♂️ Thank you as usual Linus!!!!
I love that once in a while you bounce back to stuff I unferstand ty :D or rather trying to completely understand. ty
Thank you for explaining this. I miss these type of videos.
This video made me randomly double-check how many PCIE lanes my CPU had, before you outright stated it. Awesome.
This is giving me flashbacks to manually assigning IRQ's to all the devices to try and get everything working at the same time...
uggg.. some things are best left forgotten :) IRQs and IO base address jumpers... 5 for sound card.. 3/4 for com ports... 7 for LPT port.. arghhh
This video is _very_ good! Thanks! Quite a bit more advanced than usual, but with the same simple explanations :-) I genuinely learned stuff!
More of this kind of content please, it's really the kind of knowledge a lot of us are missing. I can and have put together my own computer. I feel quite confident in my knowledge in CPU, RAMs and Graphic Card but i lack in understanding mother boards and this kind of connections.
My Computer H/S class didn't teach us this stuff this in depth. Again, CZcams proves to be the best educational platform.
Mine didn't either.. they did cover GW BASIC and DOS on i386's or commodore PETs though.. (in 1989) 🤣
School's kind of worthless.
I swear I'd only send my kids for a semester, here & there...just enough to make friends and be fluent in the culture, for lack of a better word.....then I'd have 'em homeschooled. I could school them 10X better with youtube alone.
I wend to a decent public school and they spent (like$150 million?) On a new Jr High (7th/8th/9th grade, maybe 750 of us). They kept talking about these "college level chemistry labs"
.......Then we just used the lab counters (counters that burn from nitric and maybe hydroflouric acid arent cheap!) as uncomfortable classroom desks to do busywork.
Hey that’s the motherboard you gave away to a random person today.
The one in this video is from Aorus, and he gave away an MSI board earlier.
Lol you can't even differentiate boards from different manufacturers?
@@renai.-7792 you think you know motherboards? name all the motherboards then.
@@benskyddd Where did I said I know all the motherboards? I just know how to differentiate them by different manufacturers, it's easy
@@renai.-7792 congrats
If anyone from LTT sees this, I just want to say I appreciate you guys making videos like these, I bought a 990 pro at a great price a few weeks back, I put it in the second m.2 slot not realizing it’s probably making things slower. I now understand pcie lanes and I’m switching my m.2’s around. These videos really do help, keep up the great work! :)
Very informative, bless you Linus for continuously keeping us up to date in a language average users can understand.
The whole LTT following, quick think of something funny
Yes
Something funny.
Linus sex tips
That’s assuming he’s had it lol
Jk
Done, now what?
Talking about highway speed limits
Me as a german 😂
Dieses Profilbild 😂
I'm Indian and I can confirm in india
talking about roadwork and pesky slow downs ;)
Autobahn highway
wir haben auch Geschwindikeitsbegrenzugen, aber die sind die Autos :D
um, i have been messing with computer for almost 30 years
this 5 min video was exceptionally informative and useful
more of these please
this was the most advanced topic in a long time, this was what i wanted all along. thanks!
One of my favorite precious beloved video I've ever seen.
It was all about AGP in my day.
:) my first was ISA, then PCI, then AGP and now PCIe :D oh boy, GPUs have come a long way...
@@knightnevermore I remember isa cards and edo ram. Those were the good old days.
VESA Local Bus was a fun one, too. That and the horrendously long graphics cards that plugged into it.
3dfx Voodoo 3 was my first graphics card, unreal tournament looked amazing! lol
@@AgtX999 Ahhh man, i used to have a 1mb graphics card and i went to my friends for a LAN party, i don't remember exactly which game we were playing (think it might have been Quake or Half Life) and the game juddered on my machine, then my friend installed i think it was a 4mb card and i was blown away with how amazing the game looked. All the textures looked quality :)
A long needed video my man
I just asked for another great informative tech quickie video on the main channel and now I got one! Thanks, Linus! I own a medium-sized IT company and videos like these are good to send to people who ask me questions like "why doesn't this do this?"
therapist: Shortcircuit video disguised as Techquickie video can't hurt you, it doesn't exist
Shortcircuit video disguised as Techquickie video:
Is it though? Shortcircuit is all about first impressions/unboxings and this isn't even close to that
I think you meant to say the other way around. This is a techquickie disguised as a shortcircuit
Yeah, i was confused why my harddrive dissapeared when I installed my ssd, like... Dont go yet.. I still need to copy all that data from you....
Motherboard manuals are great.
I knew about this, in the back of my mind, but I didn't know the extent of this until now. Thanks for the tips, Linus!
THANK YOU! ive been wondering why i couldnt connect more drives. didnt realize m.2 replaced some of my sata ports
The first time ever that I watched the sponsor xD
Hey everyone! I hope you all stay safe, enjoy the holidays, and have a nice day! :D
Hello everyone, this your daily dose of internet
@@ishaan2947 Lol, ok
Love the Australian road work signs at 3:58
Its like this video was reading my mind. A few hours ago I was having the M.2 disabling my SATA ports and I had no idea why.
Still feel like this is an LTT video because of the lack of the white green screen background
0:20 - hey, I see what you’re doing here
This made my day. =)))))))
Great video, loved this one!
I'm curious about the tree behind you!!! I'm hearing you, but I kept on staring at the plant.
2:01
*Plugs a RJ-45 into a USB port*
"This is why mice shouldn't have holes"-Linus like 2 days ago. 4:09 "Check out this cool mouse"
Bruhhh he Is literally a dumbo who doesnt understand what he's talking about 😑
Money is money afterall..
If Linus gave a shit about even trying to only endorse products he doesn't personally think are stupid and for chumps, he'd A) make slightly less money, something that is totally not on brand for him at all, and B) not do ads for VPNs like he has for years now.
Thanks! This video explains the Pci lanes really well.
About the mouse you mentioned at the end. I use a Bluetooth mouse with my laptop for the convenience of not needing a dongle but I don't really see much if any latency. It is one of those things most people might not even notice really. I have an HP XB4000 mouse and an Intel AX200NGW that I use for Bluetooth and WiFi. That card can be gotten cheaply but I mainly use it because it is a good one. It is not a tri-band card but it is WiFi 6 and I get a good fast connection 40 or 50 feet away on the other side of the house. This place is not small but a good TP-Link router seems to cover it well and without a horribly slow connection too! This was more about a mouse than anything and quickly expanded into other things.
Good breakdown of Mainstream boards. Limit to number of lanes and the connection to the chipset is another reason why PCIe 4 is so important. By being able to maintain and increase bandwidth without adding more lanes is much more important than saying it makes storage fast.
Wish they would increase the width of PCIE of chipset to CPU.
@@tasnimulsarwar9189 they can/do...and in the case of a budget board like a b550....you wind up siphoning the "limited" lanes garnered to cpu lanes...by taking 8x off GPU in order to widen PCI-e lanes to a multi/sata drive "build".....imagine that...buying a 2080ti to see it ran in 8x...on bios...bc youve populated too many Sata ports. JFC and i get it youd figure if you can afford a 2080ti or a 3070 you SHOULD be able to afford a x570 board instead....either way its not really a "CHOICE". Esp in terms of ITX when 200$ is a good B550i board but youre looking at 300+ for an x570 itx...or heaven forbid a z series intel itx board GOOD GOD
" you wouldn't be able to connect graphics cards without a the pci express bus"
linus has forgot about agp already -_-
Long live agp. I remember when pci-e came out and it wasn't faster yet my dad said agp would be the better choice. He was so wrong lol
Not to forget some video cards used pci (not express).
@@nielsarensman the problem with pci was that all the ports shared the same lane to the chipset. Though I guess they still do. AGP connected to the CPU iirc. Like the precursor to pcie.
"..for over a decade now"
This was enlightening. Thanks, Linus!
I know we have had the title discussion before but this video is a good example of it. It's a great video of how PCI E slots and bandwidth work which is super usefull and educational, however the usefullness dwindless as the title makes it less search-able. The main reason for titles like these is clickrate iirc as discussed on WAN show. I hope that when the traffic goes down (due to the video not being new content anymore) that they will change it to something more descriptive of the content.
Title as of 6. dec 2020: "The Sneaky Thing About PCI Express"
Someone please send Linus a hair brush stat!
And money for a haircut :D
Linus Linus Linus... please buy a comb from one of your sponsors.
Subbed! More vids like this please!
Very interesting. Thanks for the explanation Linus!
youtube: 21 comments
also youtube: no you can't see them
Reload
Yep
The trick is to go Threadripper.
no the trick is dual threadrippers.
Epyc, actually. 128 lanes, per CPU. 160 for dual CPU (many are used to connect the CPUs).
Bit pricey for a gamebox though, and probably not as good as the equivalent 3900x for games unless you go for the lower-end 3960x with its higher clock rates. Not to mention that even with boards like the MSI Creator TRX40, only two of the three onboard NVME slots are CPU-side. To get more CPU lanes to NVME drives, you have to use the riser the board comes with, and you have to be particular about which slot on the board it goes in and how it's configured.
That said, I do enjoy having blink-and-you'll-miss-it load times and not caring how many tabs I have open. CPU video transcoding at ridiculous rates is nice, too. There's definitely advantages to be had from a whole bunch of PCIe lanes and 24 cores. You're just not likely to see them if your use-case is general Internet use and (most) games.
@@technicalfool i use 3990x. follow me on facebook: gunawan shahputra.
88 pcie lanes. that's quite plentiful.
Thanks for the video!
Damn. It’s been SO long since I saw a video without an intro on CZcams. The good ol days
It's so refreshing seeing Linus talk about something he's actually knowledgeable in for once. Any time he ends up in the workshop, I die a little inside.
That's really sneaky. Super confusing. But thankful that they are here.
*stop you bot.*
Man it feels so much nicer when the background isnt just white, gives the video so much more character
great vid linus !
It's in the short circuit room, tech quickie editing process and its Linus from Linus Tech tips, the most ambitious crossover in human history
but also not a very ambitious crossover at the same time
Limits on highway?? Nah I am german
As always, quality videos right here!
Good Information! Can you tell how the integrated graphics of CPU (SoC) is connected to the CPU? Do they also consume some lanes of PCIe? For example Intel CPU with integrated graphics.
3 minutes and this video already has 2k views
Cool?
@@1x9_ethan83 bruh I see that juice WRLD pfp everywhere
69 likes. NICE!
Good Channel, keep it up!
Very good explanation!
Early squad, yo
First..... Finally after many years
Who asked
Sadly not
Literally was just researching this topic for different gpu passthrough options.
Daaaamn this is back to basics
0 comments?
2 comments lol
You are first ;)
Lol u first
Bot
u first
That thing about the larger slots isn’t true for many boards though. Especially with the bottom 16x slot it is often connected to the chipset.
About time LTT explains this. Very long overdue...crazy how relevant it still is though, since even SLI is dead now. RIP
Great info, super helpful (really).
I was literally researching this today
Old techquickie is back!
Being new to the PC world, Linus’ videos explain everything so well. It is because of him I was brave enough to build my own. He helped explain what actually matters, what is marketing BS that enabled me. This channel is a true treasure. Him and Anthony are so smart and the production budget and quality reign supreme.
Kinda why I went with Threadripper, I love having the PCI-e connectivity, I had the 5960x and while it had 40pcie lanes, it still had some weird routing and slow downs or it disabled something somehow that I needed or could use. This threadripper system I do with the Asus x399 Zenith Extreme would of had the option to turn the x8 slots into x16 so I would have to install my video card the way it is, but I got enough lanes to not slow anything down, especially storage.
5950x has 20 PCIe lanes?
@@sparhawk1228 Yes, and some of them lanes are dedicated to other parts of the system such as onboard wifi ect, i'm not sure how many lanes the chipset has, but it isn't much and can cause delays in some things though mostly irrelevant. I have a ton of high bandwidth pci-e devices where the 5950x would be fine for most of my wants, but I often over time find my self needing or wishing I had more PCI-E lanes. I had trouble with with Intel x99 with its 40 lanes and all of my nvme devices, and how the board was laid out.
The 5950x would be fine for most users who just want to game with a few pci-e devices.
finally i appreciated you after this video
i like the old videos tbh, they're kind of nostalgic, but this also nice
SOmething I notice on a lot of MBs, is that the lower PCIe slots from the top one, have less pins in them. You can even see it on this board. the bottom slot is only an 4x pin set.
eGPU in 2020 update video. About the gaming performance on a x4 pci slot over thunderbolt 3.
Measure the performance of a eGPU on build in laptop screen, external display and with different graphics cards. Go with an laptop which is sold as a eGPU compatible machine like a Lenovo Y740si-15 + Lenovo eGPU Boost station or Razer Blade Stealth + Razer Core X eGPU.
Would like to see this!
Great video.
So if I have an nvme for OS, a second nvme for steam library both connected via M.2 AND a SSD via SATA - would the performance dip be too big with a z390 Mobo and i7-9700k cpu?
I had and MKBHD rebrand advert and then a Linus pulseway advert before this video.
I think my interests may need diversifying.
Good content, good topic 👍
Thanks. I searched a good 4 years for this explaination. Now I know plugging in m.2 won't take up my GPU pic lanes.
I assumed PCI Express was older than it is. Apparently 2003.
I like learning about tech :D Thanks Linus!
I do miss the plane background. It will get use to.
The sneaky thing about the PCI slot they showed at the start of the video next to the PCIe slot in the stock image
Can you do a video on gaming laptops and which one you should buy with your budget?
im honestly surprised there was no mention of the common '16x slot that only has 4x capability' thing; that's definitely something that is rarely clear and many people don't realise.
I.... never knew this. I have my good SSD on my chipset M.2 lane, in my mind, the reason was for thermals. It was AWAY from the graphics card. I will be swapping my PCIe Gen 3 and 4 M.2s. Thank you Linus!
Please bring back the iconic white background for Techquickie.
Linus and his team are some very intelligent people. I don't play on PC I'm just not smart enough for all that. I've learned everything I know about PC from this channel. But to go implemented in real life it's just something I don't think I can do. But I absolutely love the content of this channel and LTT