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foreign

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this enormous pile of to be tested

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DisplayPort cables comes from all the most popular brands Amazon Basics

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Monoprice Best Buy and more we bought

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three of each at various lengths for the most popular models to give us multiple

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data points and we are going to be painstakingly running all of them

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through our total phase cable tester to see who has the good stuff and who has

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the crude stuff I know our sponsor build Redux has the

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Okay I lied a bit the cables have already been tested at their rated speed

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and if they passed we pushed them even further to see who is under promising

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and over delivering we did over a hundred runs in total and ended up with

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this masterpiece of a spreadsheet

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proud of this one aren't you married now why are we testing

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DisplayPort partly because we already tested HDMI and got a lot of requests to

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follow up with DisplayPort but the other half is that people like me and Wendell

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over at level one techs who apparently actually went out and bought one of

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these cable testers after our last video have had a lot of issues with

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DisplayPort over the years from intermittent signaling issues to

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outright dead cables and I think it's about time I figure out why each cable

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went through our total phase cable tester at the spec that it's rated for

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now there are a total of eight versions of DisplayPort two of which are minor a

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revisions that don't change much so we'll acknowledge that they exist and

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move along and even some of the numbered ones we didn't have to do much with

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DisplayPort versions 1.0 and 1.1 are

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relatively ancient so that's part of why we're not testing any of those cables

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here but the real reason is that they weren't widely adopted so most cables

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are rated for at least DisplayPort 1.2

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and it's the same story for DisplayPort 1.3 it was superseded by 1.4 almost

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immediately which carries the same bandwidth but added support for display

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stream compression 1.2 forward error correction and HDR 10 metadata that

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leaves us with really three display ports that matter 1.2 1.4 and the

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upcoming 2.0 spec in consumer terms the

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biggest difference between these three is that each one is rated for a

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different maximum bandwidth the higher the number the faster it can go now

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there are multiple ways to hit that limit you could crank the resolution you

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could crank the refresh rate you could crank the color depth or realistically

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some combination of those three and then you just won't be able to go any higher

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unless you enable display stream compression we could talk a little bit

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more about that later now here are the manufacturers we're talking about today

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you'll be familiar with many of these from our HDMI cable testing video where

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we covered some things in more depth that we're going to gloss over a little

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bit today like how digital signaling Works we're going to have a card in the

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end screen if you're playing catch-up now here are our tests we have three

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groupings tab one in yellow are the cables that we're testing in triplicate

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to eliminate flukes these are the most popular ones we're expecting most of you

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to actually buy Tab 2 and orange are

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single samples of nine of the top 10 cables on Amazon and finally Tab 3 in

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blue are cables that we sampled from around the office including bundled

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cables from monitors made by aorus Samsung and ASUS Rog

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all right Colin show us what's behind tab number one

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every single one passed every huh that's not what I was

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expecting so every single brand new cable that we

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purchased specifically for this video passed at its rated spec

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which I didn't see coming but the

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science behind it kind of makes sense here's the thing the inside of a

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DisplayPort cable is actually very similar to the inside of an HDMI cable

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with only one more conductor for a total of 20 versus 19.

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both of them have four shielded Twisted pairs of conductors

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think of them kind of like the sides of this lanyard but in HDMI only three of

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them carry data with a Fourth Kind of

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skinnier one that just is reserved for clock pulses DisplayPort takes advantage

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here by using all four shielded pairs to

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transmit data you know what this isn't working let's just do a different visual

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new colors of lanyards.lttstore.com this

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allows each pair to run at a lower frequency while maintaining overall

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transmission parity with HDMI so with 12

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of the 20 conductors used for the signal plus signal minus and ground connections

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that leaves eight other conductors that are used to run a configuration Channel

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an auxiliary Channel and a power connection the power connection actually

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goes unused in common cables though and is reserved for use in devices with

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integrated DisplayPort cables and having these wires connected can actually cause

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a ShortCircuit condition that was a problem in the past particularly with

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cheap Mini DisplayPort cables fun fact by the way those locking tabs on the end

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are not actually part of the official DisplayPort specification they are nice

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to have though now with respect to our results we can gather that this

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reduction in signaling frequency is contributing to better signal Integrity

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leading to DisplayPort cables being more consistent than what we saw with HDMI so

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if you're buying a brand new cable today cheap is probably cheerful and infinite

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cables once again topped our list for the lowest cost per foot followed by

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Amazon Basics and Monoprice but we're not done yet inside the dense document

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that is the DisplayPort standard there exists a set of definitions for

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transmission modes these are the bit rates that DisplayPort can transmit data

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at we're not talking about resolutions per se but rather the speed at which the

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cable operates full stop DisplayPort 1.4

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for example is compatible with four different transmission modes rbr hbr

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hbr2 and hbr3 which Peaks at 8.1gb per

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second per Lane that means with four lanes DisplayPort 1.4's Peak bandwidth

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is 32.4 gigabits per second that is

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significantly less than the 48 gigabit per second maximum of HDMI 2.1 I am not

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calling it that to get around this some applications of

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DisplayPort have implemented more than the usual four lanes Apple famously

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created a custom 8-lane DisplayPort 1.2 interface to drive the first 5k iMac and

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Thunderbolt can also have up to eight Lanes allowing it to carry two display

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signals over a single cable the long-term solution however is

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DisplayPort 2.0 which can run in three new modes named according to their

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perlane bitrate now we'll talk about why that matters

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shortly but first let's take a look at our next tab Amazon's best sellers

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how'd they do every single one passed again

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now that's crazy every single one of

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them not only met the current spec that they were rated for but even met the

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next-gen uh-br 10 spec

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Wild now they're not an amazing deal cost

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wise but um at least they're easy to order I

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guess and they helped us confirm an interesting pattern or so we thought one

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of the Insidious ways that a bad DisplayPort cable can get you is by

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working but not working at the correct link speed that's actually a feature not

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a bug DisplayPort is fully backwards compatible so every time you plug in the

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devices go through a sort of handshake process called Link Training which

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determines the speed that they can operate at without errors and even if

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the devices are both capable of a greater speed let's say DisplayPort 1.4

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a bad cable could drag them back to a

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slower link speed let's say DisplayPort 1.2 and this can be really hard to

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diagnose because the links can be renegotiated on the Fly meaning that

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they might work fine for a bit then drop down only to jump back into action again

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again and we ran into just such a cable in tab number three where we grabbed

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some longer DisplayPort cables that we've purchased over the years as well

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as a handful of cables that were included with the monitors

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I knew it I've had so many issues with

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those 25 foot Monoprice cables that we bought in bulk like ages ago but on this

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one one of the four pairs managed a continuity check so it is connected but

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failed on Signal which is the worst kind of fail

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I'm going to enjoy cutting my people up oh my God that nearly hit the lens yeah

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we also had one of Samsung's bundled cables fail out right here continuity

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means that the conductors are just not conducting now we didn't have enough of

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those kicking around that we could just positively identify as Samsung

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bundled cables so we couldn't draw a clear conclusion other than that the one

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included with your monitor might not be the best quality but pretty much any

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reputable brand cable off the shelf should be okay even if you're a

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forward-thinking consumer who might want to get the most out of Intel's upcoming

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Arc Alchemist gpus which are confirmed to have DisplayPort 2.0 thanks to

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Samsung for sponsoring today's video Samsung has something new for you the

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freestyle it's a point and play projector with a compact design and

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adjustable 180 degree cradle stand you don't need to worry about fiddling with

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a focus wheel or rearranging your projector because the auto sensing

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feature will intuitively correct skewed and blurry images for you if you're on

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the go the freestyle has a 360 degree speaker and a 5 watt woofer for powerful

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all-around sound and you can power it with an external battery so it works no

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matter where you are it uses Samsung's built-in Smart TV experience that

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features Samsung TV plus various streaming platforms and more while also

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allowing you to use Bixby or Amazon aliexa so that you can go hands-free it

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offers full HD resolution and the ability to project an image between 30

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and 100 inches allowing you to use it in a small space or you can go all out and

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create an at-home theater experience so take your theater with you wherever you

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go with the freestyle you can learn more about Samsung's the freestyle and get a

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free carrying case if you pre-order before February 10th using the link down

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below if you guys enjoyed this video go check out the HDMI cable testing video

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where we got into a little bit more depth about what some of the charts that

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you guys might be looking at here mean and yeah see like the eye diagrams and

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stuff and why a narrow eye is a bad eye