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you know what's crazy if you think about it even going back 20 years whether

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we're talking 20 pin versus 24 pin atx

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or 4 versus 8 pin CPU connectors

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motherboards and power supplies have been mostly interchangeable you just

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left some pins unpopulated or had the extras hanging off the side and the

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system would limp along as best as it could well today

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that all changes as far as i can tell i am the first to

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go hands-on with the brand new atx 12vo

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standard now this looks perfectly normal

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at first glance but wait what about this

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gone is the 24 pin connector gone is the 5

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volt rail gun is the 3.3 volt rail

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they're not there this will not work with your motherboard

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but why though Linus why do you wait so long to tell us about

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link below

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we don't have much in the way of packaging these are not retail units

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actually either of them but uh we're gonna do our best to unbox this thing so

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perfectly normal looking in every way except if you look really closely all

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we've got is 12 volt and 12 volt standby

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none of the other typical rails that you'd find on a power supply also the

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cabling harness has some extra little surprises for us

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replacing our 24 pin connector is this

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right here so it's like a 10 pin brick but there's actually only nine

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conductors in it for whatever reason that would be we've got

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a four plus four pin so the 12 volt CPU connector remains in fact this unit has

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yep here we go two of them there's another one of those we've got a

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handful of six pin and six plus twos for

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graphics cards and then the other notable omission is where's all the SATA

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and molex connectors well we do have one lead that's got a

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SATA and then two molexes but if you look the 3.3 volt and 5 volt conductors

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aren't there so they're just 12 volt which means

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whatever you're powering with these would have to not require any 5 volt

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power so for example if you had a fan controller or like a front panel

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thing on your case that used to say the connector but only needed 12 volt power

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you could use it for this so it's mechanically compatible but not

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necessarily electrically compatible with every device that it would plug into

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there's gonna be some headache and heartache

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in this transition now that's curious one of these six pins

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is keyed the same as a pci express connector which would lead me to believe

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that it delivers the same voltages but it's not labeled PCIe which i have to

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wonder is that intentional is it

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is it intended to be used it is

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how interesting let's take a look at the

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motherboard this is the asrock z490

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phantom gaming 4sr and to my knowledge

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this is the only atx 12vo motherboard

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that's actually in existence right now outside of just a

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lab somewhere asrock worked with Intel to develop this thing and

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other than the atx 12vo portion of the

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board we'll have a look at in a moment here it's pretty normal looking so you

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got your lga 1200 socket dual channel memory you got your brm cooling you got

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your dual PCIe 16x slots all that normal stuff but here up here this is where

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things get spicy so that's where that 10

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pin connector goes this is called the atx 12vo connector and then that second

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six pin that is otherwise identical to

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pci express 6 pin is apparently called atx board power 2.

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and then these are fascinating so just like we saw on the mac pro where

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if you wanted to plug in a SATA drive you actually had to

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plug off of the motherboard in order to deliver power to it well we're seeing

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exactly the same thing here so these are SATA power connector one and two

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remember what i said about that SATA power connector on the power supply it

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doesn't have all of the conductors in it so we actually need to take 12 volt into

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the motherboard use this dc to dc conversion circuitry and then

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come out here in order to properly power up a SATA drive

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before you ask where you can buy it though this motherboard is not intended

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for sales in the regular channel and it's actually for system integrators who

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want to be among the first to adopt this new standard let's talk about why

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but first some background i don't want to learn

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too bad at a very basic level a computer

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power supply converts the ac or alternating current from your wall into

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the dc or direct current that the integrated circuits in your pc need to

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operate a CPU's logic gates wouldn't work very

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well if the electrons were flowing first one way then the other 60 times a second

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the harder part of a power supply's job is that it needs to simultaneously do

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this multiple times over supplying a variety of different voltages to the

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various parts of your system and it

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needs to output within very tight tolerances to avoid unnecessary wear and

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tear think about how your house lights might dim a little bit when you fire up your

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clothes dryer that ain't ideal for sensitive electronics so a good power

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supply provides steady clean power to

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for example your graphics card whether your CPU is sitting there doing nothing

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or just spinning up a big rendering project

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the final challenge for a power supply is that it needs to do all of this

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efficiently not only does any wasted energy get converted to heat making your

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pc run hotter and louder due to the extra cooling requirements it also just

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plain wastes energy putting more strain on the electrical grid and adding more

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pollution to the environment with no real benefit whatsoever so on the one

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hand it's great that we've enjoyed this period of unprecedented

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intergenerational compatibility because the evolutions of the atx standard have

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been mostly geared around delivering more juice to keep up with ever more

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power-hungry hardware but on the other hand meanwhile the rest

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of the world has been barreling towards an energy consumption crisis of humanity

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threatening proportions and industries like utilities transportation hvac and

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consumer electronics have been under pressure from regulatory bodies to hit

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ever more aggressive energy efficiency targets so that

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is what's driving the new standard that we're looking at here

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now to be clear it's not like computer power supplies

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haven't gotten more efficient 80 plus marketing has been great for raising

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consumer awareness of power supply efficiency

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but something you probably don't know is that a basic 80 plus certified power

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supply is only required to hit 80

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efficiency at 20 load or more

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which only really happens when you're actually doing something with your

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computer let's take this machine for example it's

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got a 650 watt power supply and sitting

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here at the Windows desktop it's sucking back

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anywhere between 60 and 80 watts

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that's only about 9

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at these kinds of loads according to Intel we could be looking at as low as

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50 to 60 efficiency

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let's swap out the power supply and motherboard with our new atx 12vo setup

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and see how it goes i actually have not tried this so

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good luck everybody now i may have put myself at a bit of a disadvantage here

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because the lower you go in terms of power consumption the less efficient a

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conventional power supply is so the fact that i even have a discrete graphics

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card in here means that we might not see as extreme an improvement as we would if

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we were running say on board graphics things like RGB lights on the memory are

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also going to contribute to that i do still want to give it a crack

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though given that this motherboard that we're trying out here is marketed as

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i mean gaming is right in the name and it would be pretty atypical for a gamer

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to not at least have some manner of discrete graphics card in their system

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my muscle memory was like i'm hooking up a new motherboard i'ma put in my

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hook up the new power supply i've seen articles about this

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but i'm pretty sure i'm the first one to actually hook one up outside of a lab

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the fact that we have so many pins i mean it's ten plus six this is 16 pins

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it sort of raises the question why didn't they just do like

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two eight pin connectors which we already have and if they didn't want to

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reuse connectors we already have why did they use a pci e6 pin just seems like if

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part of the goal was to reduce the bulk of the connector then

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mission not accomplished it's like very similar

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oh is that it wait are we ready

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atx 12vo here we go ladies and gentlemen

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i'm rooting for you atx12vu ah excellent uh date and time not set

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who cares this is huge

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i was not expecting this holy crap right

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that's actually way better than i was expecting

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you know what the crazy part of this is i was just guessing at what kind of

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grade of efficiency power supply this was if you google this part number

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literally zero google results come up nothing so i was just guessing 650 i

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know it's 650 watt but i was guessing gd was going to mean that they were

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targeting kind of 80 plus gold ish efficiency so that's why we picked an 80

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plus gold power supply so this is a seasonic focus gold to compare it to and

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even though we've got a graphics card and everything we just cut our idle

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power consumption literally in half less than half

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what about like rendering i'm really glad you asked so

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these changes are really focused on idle

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power consumption and once you reach the wheelhouse of a conventional power

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supply which is typically around 50 load

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the advantages pretty much disappear so that was why i

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didn't do like a heavy load test before and after i'm not expecting really any

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savings there so that raises the question

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why is this so much better i'm so glad we got this result because the rest of

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the video is scripted according to it's better here's the thing converting from ac to

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dc power is extremely inefficient and conventional power supplies do it

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multiple times for the multiple voltages

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that they need to supply now it's actually better to go from ac to 12 volt

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only like we're doing here and then derive the other required dc voltages

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from that so Intel figures we should be able to get as high as 75

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efficiency even at just 8 to 10 watts

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but minus you might say some high-end power

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supplies do that already anyway so to

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meet upcoming energy efficiency standards like top runner from japan cec

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tier 2 and energy star 8.0 Intel and

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their partners went a step further that is why the 12 volt down conversion is

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taking place here on the motherboard rather than in the power supply

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because the higher the voltage the less

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conduction loss we're going to need to deal with over the runs of wire that go

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to the motherboard so by having only 12 volt and 12 volt standby coming from the

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power supply you actually get marginally less loss there as well now there is an

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increase in board space and you can see here how much is required for not just

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the voltage conversion but even these extra connectors that you need for

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things like you know hard drives but Intel says that from the boards that

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they've seen this is still achievable for micro atx boards now it'll add some

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cost on the motherboard side but you should end up saving some cost on the

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power supply side and it should end up being about a wash for the consumer so

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it works um now what

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for most people nothing at the moment this standard is poised to play a much

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bigger role in system integrator machines that are targeting government

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or other institutions that have efficiency targets to hit while the 24

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pin standard still makes up for its inefficiency with the convenience of

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forward and backwards compatibility for enthusiasts

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in the long term though who knows it might end up being a big success like

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the eps 8-pin CPU connector that was

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ultimately adopted by AMD as processor power consumption exploded in the early

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knots or it might be a crushing failure like btx which incidentally was also an

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Intel standard that started out as a system integrator only play speaking of

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play play me off to the spot whatever sponsor

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