{"video_id":"aJEq7H4Wf6U","title":"DDR5 is FINALLY HERE... and I've got it","channel":"Linus Tech Tips","show":"Linus Tech Tips","published_at":"2022-05-05T14:53:29Z","duration_s":665,"segments":[{"start_s":0.08,"end_s":8.08,"text":"did you ever suddenly wake up and realize holy smokes that thing that felt like","speaker":null,"is_sponsor":0},{"start_s":5.04,"end_s":10.44,"text":"yesterday was seven years ago that's","speaker":null,"is_sponsor":0},{"start_s":8.08,"end_s":15.04,"text":"ddr4 i know right 2014 this stuff came out","speaker":null,"is_sponsor":0},{"start_s":13.2,"end_s":20.56,"text":"see you later cause there's a new kid in town ddr5 desktop platforms are right","speaker":null,"is_sponsor":0},{"start_s":18.32,"end_s":25.039,"text":"around the corner and it's time to meet the fifth generation memory technology","speaker":null,"is_sponsor":0},{"start_s":22.96,"end_s":29.679,"text":"that's going to be juicing up our speeds and our capacities for at least the next","speaker":null,"is_sponsor":0},{"start_s":27.359,"end_s":33.52,"text":"few years starting with a physical look at what's different followed by a deeper","speaker":null,"is_sponsor":0},{"start_s":31.519,"end_s":37.92,"text":"dive into what makes this new breed of RAM stand out just like our sponsor","speaker":null,"is_sponsor":0},{"start_s":35.84,"end_s":41.52,"text":"glasswire stands out keep track of the weird stuff that's connecting to your pc","speaker":null,"is_sponsor":0},{"start_s":39.84,"end_s":45.92,"text":"even when you aren't using it with glass wire if a strange device joins your Wi-Fi","speaker":null,"is_sponsor":0},{"start_s":43.52,"end_s":49.84,"text":"you'll be notified instantly get 25 off using code Linus at the link below","speaker":null,"is_sponsor":0},{"start_s":57.199,"end_s":64.799,"text":"this is it my first hands-on with a full retail kit","speaker":null,"is_sponsor":0},{"start_s":61.68,"end_s":66.88,"text":"of ddr5 memory on the surface it really","speaker":null,"is_sponsor":0},{"start_s":64.799,"end_s":71.92,"text":"doesn't look very different in fact it even has the same 288 pins as ddr4","speaker":null,"is_sponsor":0},{"start_s":70.24,"end_s":77.92,"text":"memory but don't imagine that you're going to be fitting it into the same slot the key has been moved to prevent","speaker":null,"is_sponsor":0},{"start_s":75.84,"end_s":81.04,"text":"any but the most determined users from managing to mix up their memory","speaker":null,"is_sponsor":0},{"start_s":79.759,"end_s":86.32,"text":"generations and for good reason one of the biggest","speaker":null,"is_sponsor":0},{"start_s":83.2,"end_s":88.96,"text":"changes from ddr4 is immediately visible","speaker":null,"is_sponsor":0},{"start_s":86.32,"end_s":93.92,"text":"on our bare board here look at this the power management integrated circuit or","speaker":null,"is_sponsor":0},{"start_s":91.04,"end_s":98.72,"text":"pmic has been moved from the motherboard to the memory module itself now the pmix","speaker":null,"is_sponsor":0},{"start_s":96.72,"end_s":103.6,"text":"role is to take one of the standard output voltages from your computer power","speaker":null,"is_sponsor":0},{"start_s":100.4,"end_s":105.84,"text":"supply in this case 5 volts and convert","speaker":null,"is_sponsor":0},{"start_s":103.6,"end_s":111.119,"text":"it to the lower 1.1 volts that are required by the ddr5 chips here on the","speaker":null,"is_sponsor":0},{"start_s":108.159,"end_s":115.439,"text":"module this move was absolutely key to making the signal integrity improvements","speaker":null,"is_sponsor":0},{"start_s":112.96,"end_s":120.96,"text":"that were required to ramp ddr5 up to speeds 50 higher than last gen and even","speaker":null,"is_sponsor":0},{"start_s":118.719,"end_s":125.52,"text":"beyond if this alleged leaked roadmap is to be believed one curious side effect","speaker":null,"is_sponsor":0},{"start_s":123.119,"end_s":130.72,"text":"of this though is that even though ddr5 runs at nearly 10 percent lower voltages","speaker":null,"is_sponsor":0},{"start_s":128.0,"end_s":135.52,"text":"than ddr4 which should lower power draw the onboard pmic is not going to operate","speaker":null,"is_sponsor":0},{"start_s":133.04,"end_s":139.2,"text":"at 100 efficiency meaning that we could actually end up needing to deal with a","speaker":null,"is_sponsor":0},{"start_s":137.04,"end_s":142.64,"text":"small amount of waste heat on each module g-scale assures me though that","speaker":null,"is_sponsor":0},{"start_s":141.04,"end_s":146.879,"text":"it's unlikely we'll see a return to those clip-on RAM fans from the ddr2","speaker":null,"is_sponsor":0},{"start_s":145.2,"end_s":150.16,"text":"days those things really sucked they were loud and the fans failed all the","speaker":null,"is_sponsor":0},{"start_s":148.48,"end_s":155.76,"text":"time another side effect of moving the pmic on module is that it adds cost to","speaker":null,"is_sponsor":0},{"start_s":152.56,"end_s":158.08,"text":"the individual modules so once you also","speaker":null,"is_sponsor":0},{"start_s":155.76,"end_s":163.36,"text":"account for the more complicated pcb design and the early adopter tax you can","speaker":null,"is_sponsor":0},{"start_s":160.64,"end_s":169.2,"text":"expect ddr5 modules to be significantly more expensive than ddr4 modules of the","speaker":null,"is_sponsor":0},{"start_s":166.0,"end_s":171.519,"text":"same capacity now in theory some of this","speaker":null,"is_sponsor":0},{"start_s":169.2,"end_s":175.519,"text":"cost should be offset by removing power management from the motherboard but i've","speaker":null,"is_sponsor":0},{"start_s":173.68,"end_s":178.959,"text":"only rarely seen motherboards get cheaper from one generation to the next","speaker":null,"is_sponsor":0},{"start_s":177.44,"end_s":183.04,"text":"and in light of the ongoing worldwide semiconductor shortage not to mention","speaker":null,"is_sponsor":0},{"start_s":180.879,"end_s":187.12,"text":"the inclusion of pci express gen 5 on these upcoming platforms which has its","speaker":null,"is_sponsor":0},{"start_s":185.2,"end_s":191.68,"text":"own costly trace routing challenges i will be pretty surprised if it happens","speaker":null,"is_sponsor":0},{"start_s":189.12,"end_s":194.879,"text":"this time the good news though is ddr5 comes with some pretty spectacular","speaker":null,"is_sponsor":0},{"start_s":193.12,"end_s":199.2,"text":"benefits that aren't immediately obvious on a spec sheet like i'd forgive you for","speaker":null,"is_sponsor":0},{"start_s":197.04,"end_s":203.599,"text":"looking at the launch jdeck ddr5 frequency of 4 800 mega transfers per","speaker":null,"is_sponsor":0},{"start_s":201.68,"end_s":207.44,"text":"second and thinking wow that sounds pretty unexceptional","speaker":null,"is_sponsor":0},{"start_s":205.519,"end_s":211.68,"text":"compared to something like this g skill kid on new egg that's rated at a","speaker":null,"is_sponsor":0},{"start_s":209.04,"end_s":217.04,"text":"blistering 5300 mega megatransfers per second especially considering that cast","speaker":null,"is_sponsor":0},{"start_s":214.159,"end_s":221.28,"text":"latency or the number of RAM cycles to fulfill a data request is expected to be","speaker":null,"is_sponsor":0},{"start_s":219.2,"end_s":224.959,"text":"in the neighborhood of double compared to last gen but here's the thing","speaker":null,"is_sponsor":0},{"start_s":223.2,"end_s":229.28,"text":"remember that video we did recently explaining how frequency alone doesn't","speaker":null,"is_sponsor":0},{"start_s":227.04,"end_s":234.48,"text":"paint the full picture of performance well for one thing the memory controller","speaker":null,"is_sponsor":0},{"start_s":231.76,"end_s":239.04,"text":"in your ddr4 compatible CPU it wasn't designed with these kinds of speeds in","speaker":null,"is_sponsor":0},{"start_s":236.319,"end_s":242.879,"text":"mind so as with any form of overclocking it's a bit of a crap shoot whether it'll","speaker":null,"is_sponsor":0},{"start_s":240.64,"end_s":246.4,"text":"even work with super fast modules like those ones and for another past a","speaker":null,"is_sponsor":0},{"start_s":244.959,"end_s":251.439,"text":"certain point there are actually internal bottlenecks on the memory ics","speaker":null,"is_sponsor":0},{"start_s":249.599,"end_s":255.68,"text":"that's the chips on the module that would prevent them from properly taking","speaker":null,"is_sponsor":0},{"start_s":253.12,"end_s":259.84,"text":"advantage of any additional speed anyway this part's a little complicated but","speaker":null,"is_sponsor":0},{"start_s":257.28,"end_s":264.24,"text":"bear with me internally each ic has these two-dimensional grids of bits you","speaker":null,"is_sponsor":0},{"start_s":262.56,"end_s":269.84,"text":"know zeros and ones and they're called banks these banks get bundled into bank","speaker":null,"is_sponsor":0},{"start_s":266.88,"end_s":273.84,"text":"groups and to explain it simply whenever a bank group fires off the data","speaker":null,"is_sponsor":0},{"start_s":271.759,"end_s":277.759,"text":"requested by the CPU that bank group needs a little bit of time to recover","speaker":null,"is_sponsor":0},{"start_s":275.68,"end_s":281.759,"text":"during that time the other bank groups fire one after the other to fill up a","speaker":null,"is_sponsor":0},{"start_s":279.919,"end_s":286.479,"text":"burst buffer you can think of it kind of like a minigun where each barrel is a","speaker":null,"is_sponsor":0},{"start_s":284.0,"end_s":290.96,"text":"bank group and the bullets are data bits firing into the buffer except","speaker":null,"is_sponsor":0},{"start_s":289.12,"end_s":295.68,"text":"what happens if the module is running at such a high speed that we roll back","speaker":null,"is_sponsor":0},{"start_s":293.199,"end_s":300.639,"text":"around to our first bank group before it's recovered that's a problem","speaker":null,"is_sponsor":0},{"start_s":298.32,"end_s":306.16,"text":"that could be the bottleneck so to solve it ddr5 doubles the number of bank","speaker":null,"is_sponsor":0},{"start_s":303.6,"end_s":309.84,"text":"groups from four to eight that gives each bank group way more time to cool","speaker":null,"is_sponsor":0},{"start_s":308.16,"end_s":315.12,"text":"down and pretty much guarantees that we'll be able to properly take advantage","speaker":null,"is_sponsor":0},{"start_s":311.84,"end_s":317.039,"text":"of speeds well beyond the 6 000 or so","speaker":null,"is_sponsor":0},{"start_s":315.12,"end_s":322.24,"text":"mega transfers per second of first generation oc kits like this trident z5","speaker":null,"is_sponsor":0},{"start_s":319.759,"end_s":325.36,"text":"here and it gets even more interesting if you're into this sort of thing which","speaker":null,"is_sponsor":0},{"start_s":323.84,"end_s":329.199,"text":"you obviously are because you've made it this far the thing is while the minigun","speaker":null,"is_sponsor":0},{"start_s":327.44,"end_s":332.96,"text":"analogy helps us to understand bank group cooldowns in the real world it","speaker":null,"is_sponsor":0},{"start_s":331.28,"end_s":337.44,"text":"would be terribly inefficient to transfer ones and zeros to the CPU","speaker":null,"is_sponsor":0},{"start_s":335.199,"end_s":341.52,"text":"individually so instead let's imagine that our minigun is shooting all of","speaker":null,"is_sponsor":0},{"start_s":339.28,"end_s":344.8,"text":"these bits into an intermediary buffer called the burst buffer and we can think","speaker":null,"is_sponsor":0},{"start_s":343.68,"end_s":349.28,"text":"of this kind of like firing a single shotgun","speaker":null,"is_sponsor":0},{"start_s":347.36,"end_s":355.759,"text":"shell full of bits over to the CPU all at once a bit more impactful right now","speaker":null,"is_sponsor":0},{"start_s":352.639,"end_s":359.12,"text":"ddr4 modules are linked to the CPU with","speaker":null,"is_sponsor":0},{"start_s":355.759,"end_s":361.12,"text":"a single 64-bit bus or communication","speaker":null,"is_sponsor":0},{"start_s":359.12,"end_s":367.28,"text":"channel and they have a burst length of eight so we could say that our fully","speaker":null,"is_sponsor":0},{"start_s":363.44,"end_s":369.039,"text":"automatic ddr4 shotgun here fires 64","speaker":null,"is_sponsor":0},{"start_s":367.28,"end_s":372.0,"text":"pellet rounds with an eight round magazine bang bang bang bang bang bang","speaker":null,"is_sponsor":0},{"start_s":370.88,"end_s":378.56,"text":"bang bang so 64 bits times eight rounds gives us a","speaker":null,"is_sponsor":0},{"start_s":375.44,"end_s":380.319,"text":"total of 64 bytes of data per burst","speaker":null,"is_sponsor":0},{"start_s":378.56,"end_s":385.68,"text":"before it needs to be reloaded by our bank groups follow so far","speaker":null,"is_sponsor":0},{"start_s":382.479,"end_s":389.28,"text":"good ddr5 modules change this up in a","speaker":null,"is_sponsor":0},{"start_s":385.68,"end_s":391.759,"text":"big way instead of that single 64-bit","speaker":null,"is_sponsor":0},{"start_s":389.28,"end_s":395.12,"text":"bus we actually have two 32-bit","speaker":null,"is_sponsor":0},{"start_s":393.28,"end_s":400.72,"text":"sub-channels that can operate independently so back to our shotgun","speaker":null,"is_sponsor":0},{"start_s":397.36,"end_s":403.84,"text":"here we fire smaller shells with only 32","speaker":null,"is_sponsor":0},{"start_s":400.72,"end_s":407.68,"text":"bits each but we double our burst length","speaker":null,"is_sponsor":0},{"start_s":403.84,"end_s":410.96,"text":"or our magazine capacity to 16 per burst","speaker":null,"is_sponsor":0},{"start_s":407.68,"end_s":414.24,"text":"so if we math it up here again 32 bits","speaker":null,"is_sponsor":0},{"start_s":410.96,"end_s":415.84,"text":"times a burst length of 16 that is 64","speaker":null,"is_sponsor":0},{"start_s":414.24,"end_s":421.039,"text":"bytes per burst just like ddr4","speaker":null,"is_sponsor":0},{"start_s":417.84,"end_s":424.4,"text":"except now we've got two barrels that","speaker":null,"is_sponsor":0},{"start_s":421.039,"end_s":427.12,"text":"can fire independently each with its own","speaker":null,"is_sponsor":0},{"start_s":424.4,"end_s":432.4,"text":"16 round magazine but don't get carried away this isn't","speaker":null,"is_sponsor":0},{"start_s":429.52,"end_s":436.8,"text":"dual channel and you don't get to just add that total theoretical capacity","speaker":null,"is_sponsor":0},{"start_s":434.479,"end_s":441.36,"text":"together to boost your memory bandwidth you're still going to want to run","speaker":null,"is_sponsor":0},{"start_s":438.639,"end_s":444.4,"text":"multiple ddr5 modules in dual channel mode or","speaker":null,"is_sponsor":0},{"start_s":442.96,"end_s":449.28,"text":"more channels in the workstation and server space the real benefit of these","speaker":null,"is_sponsor":0},{"start_s":446.72,"end_s":455.599,"text":"independent sub channels is efficiency and latency in ddr4 if you only have 32","speaker":null,"is_sponsor":0},{"start_s":453.44,"end_s":459.919,"text":"bits of data in the burst buffer you just have to fill the rest with junk","speaker":null,"is_sponsor":0},{"start_s":457.52,"end_s":464.879,"text":"before you ship it out to the CPU that takes time and it means that the CPU has","speaker":null,"is_sponsor":0},{"start_s":462.72,"end_s":469.36,"text":"to wait around well now you don't have to wait you can just send 32 bits if","speaker":null,"is_sponsor":0},{"start_s":467.52,"end_s":474.96,"text":"that's all that's needed right now and the CPU won't have to wait around and","speaker":null,"is_sponsor":0},{"start_s":471.52,"end_s":477.12,"text":"there's more ddr5 ics so again that's","speaker":null,"is_sponsor":0},{"start_s":474.96,"end_s":482.24,"text":"the individual memory chips themselves now contain a basic form of ecc or error","speaker":null,"is_sponsor":0},{"start_s":480.319,"end_s":486.879,"text":"correction that operates completely transparently to the end user it can't","speaker":null,"is_sponsor":0},{"start_s":484.639,"end_s":491.919,"text":"be disabled and it serves to improve stability during high speed data storage","speaker":null,"is_sponsor":0},{"start_s":488.879,"end_s":494.879,"text":"and transfers within the ic honestly","speaker":null,"is_sponsor":0},{"start_s":491.919,"end_s":498.16,"text":"this was way overdue in my opinion but i'm still grateful we're finally getting","speaker":null,"is_sponsor":0},{"start_s":496.479,"end_s":501.599,"text":"it especially considering that unregistered ddr5 dimms you know the","speaker":null,"is_sponsor":0},{"start_s":500.319,"end_s":506.08,"text":"kind that just goes in your regular desktop computer are expected to hit","speaker":null,"is_sponsor":0},{"start_s":503.44,"end_s":511.599,"text":"capacities of 128 gigabytes on a single stick","speaker":null,"is_sponsor":0},{"start_s":509.12,"end_s":515.76,"text":"and load reduced dimms are potentially able to go as high as four terabytes per","speaker":null,"is_sponsor":0},{"start_s":514.159,"end_s":520.32,"text":"module with a combination of improved density and dye stacking in the coming","speaker":null,"is_sponsor":0},{"start_s":517.919,"end_s":525.2,"text":"years but let's slow down for a second in spite of its benefits ddr5 isn't some","speaker":null,"is_sponsor":0},{"start_s":522.719,"end_s":530.56,"text":"kind of magic silver bullet either and at the same frequency let's say 4 800","speaker":null,"is_sponsor":0},{"start_s":528.24,"end_s":537.2,"text":"mega transfers per second overclock spec ddr4 is actually expected to outperform","speaker":null,"is_sponsor":0},{"start_s":534.32,"end_s":540.24,"text":"this bass spec ddr5 well no problem you might think you'll just want to","speaker":null,"is_sponsor":0},{"start_s":538.48,"end_s":544.24,"text":"overclock the snot out of your ddr5 and go faster right","speaker":null,"is_sponsor":0},{"start_s":542.24,"end_s":548.8,"text":"might not be quite that simple remember the on module power management ic well","speaker":null,"is_sponsor":0},{"start_s":546.56,"end_s":553.279,"text":"as it turns out there are two different types of them","speaker":null,"is_sponsor":0},{"start_s":550.16,"end_s":556.16,"text":"one is not designed to go higher than","speaker":null,"is_sponsor":0},{"start_s":553.279,"end_s":560.24,"text":"the default of 1.1 to about","speaker":null,"is_sponsor":0},{"start_s":557.08,"end_s":562.64,"text":"1.435 volts the other kind which has to","speaker":null,"is_sponsor":0},{"start_s":560.24,"end_s":567.12,"text":"be specifically built onto your module at the time of construction is a","speaker":null,"is_sponsor":0},{"start_s":565.12,"end_s":571.6,"text":"programmable mode one that can go as high as well there doesn't seem to be a","speaker":null,"is_sponsor":0},{"start_s":569.279,"end_s":575.68,"text":"set limit for that one so expect to see some pretty exotic modules down the line","speaker":null,"is_sponsor":0},{"start_s":573.76,"end_s":579.68,"text":"and some pretty exotic cooling on them truthfully even the non-oc modules","speaker":null,"is_sponsor":0},{"start_s":577.839,"end_s":584.399,"text":"should end up being pretty interesting since ddr5 is also getting an spd or","speaker":null,"is_sponsor":0},{"start_s":582.72,"end_s":588.48,"text":"speed chip facelift instead of just storing default","speaker":null,"is_sponsor":0},{"start_s":586.32,"end_s":592.72,"text":"frequency and latency values which is usually going to contain both a stock","speaker":null,"is_sponsor":0},{"start_s":590.16,"end_s":596.64,"text":"and an overclocked or xmp setting it now also handles signaling to the power","speaker":null,"is_sponsor":0},{"start_s":594.48,"end_s":600.88,"text":"management ic and to any other microcontrollers on the module like RGB","speaker":null,"is_sponsor":0},{"start_s":598.8,"end_s":605.36,"text":"lighting controllers so i'm expecting that to directly result in more creative","speaker":null,"is_sponsor":0},{"start_s":603.6,"end_s":608.8,"text":"lighting implementations than we've ever seen before and","speaker":null,"is_sponsor":0},{"start_s":606.64,"end_s":613.36,"text":"lord knows that is what the industry needs more RGB i saved the best for","speaker":null,"is_sponsor":0},{"start_s":611.04,"end_s":616.48,"text":"lassie just like i saved our sponsor for last thanks to microcenter for","speaker":null,"is_sponsor":0},{"start_s":614.8,"end_s":620.64,"text":"sponsoring this video microcenter has partnered with ASUS to create a new easy","speaker":null,"is_sponsor":0},{"start_s":618.8,"end_s":623.6,"text":"to use online pc building tool that helps customers build their own computer","speaker":null,"is_sponsor":0},{"start_s":622.399,"end_s":627.76,"text":"with three different base starting points value performance or ultimate","speaker":null,"is_sponsor":0},{"start_s":626.16,"end_s":631.44,"text":"each base system will include a case with a pre-installed motherboard power","speaker":null,"is_sponsor":0},{"start_s":629.279,"end_s":635.44,"text":"supply and separately packaged graphics card you then add your choice of CPU","speaker":null,"is_sponsor":0},{"start_s":633.36,"end_s":638.72,"text":"between AMD and Intel as well as your choice of RAM storage and operating","speaker":null,"is_sponsor":0},{"start_s":637.12,"end_s":642.48,"text":"system the parts can be arranged for same day in-store pickup or for an added","speaker":null,"is_sponsor":0},{"start_s":640.8,"end_s":645.44,"text":"build fee micro center will assemble the computer for you if you're unsure of","speaker":null,"is_sponsor":0},{"start_s":644.0,"end_s":650.959,"text":"what parts you need micro center's expert technicians can walk you through selecting your components so don't wait","speaker":null,"is_sponsor":0},{"start_s":648.959,"end_s":656.959,"text":"check out micro center's new pc builder and get a free 240 gig SSD if you're a","speaker":null,"is_sponsor":0},{"start_s":654.16,"end_s":659.68,"text":"new customer at the links down below if you're looking for another video to","speaker":null,"is_sponsor":0},{"start_s":658.0,"end_s":666.079,"text":"watch maybe check out our most recent look into how memory speed impacts","speaker":null,"is_sponsor":0},{"start_s":661.519,"end_s":666.079,"text":"performance particularly in gaming","speaker":null,"is_sponsor":0}],"full_text":"did you ever suddenly wake up and realize holy smokes that thing that felt like yesterday was seven years ago that's ddr4 i know right 2014 this stuff came out see you later cause there's a new kid in town ddr5 desktop platforms are right around the corner and it's time to meet the fifth generation memory technology that's going to be juicing up our speeds and our capacities for at least the next few years starting with a physical look at what's different followed by a deeper dive into what makes this new breed of RAM stand out just like our sponsor glasswire stands out keep track of the weird stuff that's connecting to your pc even when you aren't using it with glass wire if a strange device joins your Wi-Fi you'll be notified instantly get 25 off using code Linus at the link below this is it my first hands-on with a full retail kit of ddr5 memory on the surface it really doesn't look very different in fact it even has the same 288 pins as ddr4 memory but don't imagine that you're going to be fitting it into the same slot the key has been moved to prevent any but the most determined users from managing to mix up their memory generations and for good reason one of the biggest changes from ddr4 is immediately visible on our bare board here look at this the power management integrated circuit or pmic has been moved from the motherboard to the memory module itself now the pmix role is to take one of the standard output voltages from your computer power supply in this case 5 volts and convert it to the lower 1.1 volts that are required by the ddr5 chips here on the module this move was absolutely key to making the signal integrity improvements that were required to ramp ddr5 up to speeds 50 higher than last gen and even beyond if this alleged leaked roadmap is to be believed one curious side effect of this though is that even though ddr5 runs at nearly 10 percent lower voltages than ddr4 which should lower power draw the onboard pmic is not going to operate at 100 efficiency meaning that we could actually end up needing to deal with a small amount of waste heat on each module g-scale assures me though that it's unlikely we'll see a return to those clip-on RAM fans from the ddr2 days those things really sucked they were loud and the fans failed all the time another side effect of moving the pmic on module is that it adds cost to the individual modules so once you also account for the more complicated pcb design and the early adopter tax you can expect ddr5 modules to be significantly more expensive than ddr4 modules of the same capacity now in theory some of this cost should be offset by removing power management from the motherboard but i've only rarely seen motherboards get cheaper from one generation to the next and in light of the ongoing worldwide semiconductor shortage not to mention the inclusion of pci express gen 5 on these upcoming platforms which has its own costly trace routing challenges i will be pretty surprised if it happens this time the good news though is ddr5 comes with some pretty spectacular benefits that aren't immediately obvious on a spec sheet like i'd forgive you for looking at the launch jdeck ddr5 frequency of 4 800 mega transfers per second and thinking wow that sounds pretty unexceptional compared to something like this g skill kid on new egg that's rated at a blistering 5300 mega megatransfers per second especially considering that cast latency or the number of RAM cycles to fulfill a data request is expected to be in the neighborhood of double compared to last gen but here's the thing remember that video we did recently explaining how frequency alone doesn't paint the full picture of performance well for one thing the memory controller in your ddr4 compatible CPU it wasn't designed with these kinds of speeds in mind so as with any form of overclocking it's a bit of a crap shoot whether it'll even work with super fast modules like those ones and for another past a certain point there are actually internal bottlenecks on the memory ics that's the chips on the module that would prevent them from properly taking advantage of any additional speed anyway this part's a little complicated but bear with me internally each ic has these two-dimensional grids of bits you know zeros and ones and they're called banks these banks get bundled into bank groups and to explain it simply whenever a bank group fires off the data requested by the CPU that bank group needs a little bit of time to recover during that time the other bank groups fire one after the other to fill up a burst buffer you can think of it kind of like a minigun where each barrel is a bank group and the bullets are data bits firing into the buffer except what happens if the module is running at such a high speed that we roll back around to our first bank group before it's recovered that's a problem that could be the bottleneck so to solve it ddr5 doubles the number of bank groups from four to eight that gives each bank group way more time to cool down and pretty much guarantees that we'll be able to properly take advantage of speeds well beyond the 6 000 or so mega transfers per second of first generation oc kits like this trident z5 here and it gets even more interesting if you're into this sort of thing which you obviously are because you've made it this far the thing is while the minigun analogy helps us to understand bank group cooldowns in the real world it would be terribly inefficient to transfer ones and zeros to the CPU individually so instead let's imagine that our minigun is shooting all of these bits into an intermediary buffer called the burst buffer and we can think of this kind of like firing a single shotgun shell full of bits over to the CPU all at once a bit more impactful right now ddr4 modules are linked to the CPU with a single 64-bit bus or communication channel and they have a burst length of eight so we could say that our fully automatic ddr4 shotgun here fires 64 pellet rounds with an eight round magazine bang bang bang bang bang bang bang bang so 64 bits times eight rounds gives us a total of 64 bytes of data per burst before it needs to be reloaded by our bank groups follow so far good ddr5 modules change this up in a big way instead of that single 64-bit bus we actually have two 32-bit sub-channels that can operate independently so back to our shotgun here we fire smaller shells with only 32 bits each but we double our burst length or our magazine capacity to 16 per burst so if we math it up here again 32 bits times a burst length of 16 that is 64 bytes per burst just like ddr4 except now we've got two barrels that can fire independently each with its own 16 round magazine but don't get carried away this isn't dual channel and you don't get to just add that total theoretical capacity together to boost your memory bandwidth you're still going to want to run multiple ddr5 modules in dual channel mode or more channels in the workstation and server space the real benefit of these independent sub channels is efficiency and latency in ddr4 if you only have 32 bits of data in the burst buffer you just have to fill the rest with junk before you ship it out to the CPU that takes time and it means that the CPU has to wait around well now you don't have to wait you can just send 32 bits if that's all that's needed right now and the CPU won't have to wait around and there's more ddr5 ics so again that's the individual memory chips themselves now contain a basic form of ecc or error correction that operates completely transparently to the end user it can't be disabled and it serves to improve stability during high speed data storage and transfers within the ic honestly this was way overdue in my opinion but i'm still grateful we're finally getting it especially considering that unregistered ddr5 dimms you know the kind that just goes in your regular desktop computer are expected to hit capacities of 128 gigabytes on a single stick and load reduced dimms are potentially able to go as high as four terabytes per module with a combination of improved density and dye stacking in the coming years but let's slow down for a second in spite of its benefits ddr5 isn't some kind of magic silver bullet either and at the same frequency let's say 4 800 mega transfers per second overclock spec ddr4 is actually expected to outperform this bass spec ddr5 well no problem you might think you'll just want to overclock the snot out of your ddr5 and go faster right might not be quite that simple remember the on module power management ic well as it turns out there are two different types of them one is not designed to go higher than the default of 1.1 to about 1.435 volts the other kind which has to be specifically built onto your module at the time of construction is a programmable mode one that can go as high as well there doesn't seem to be a set limit for that one so expect to see some pretty exotic modules down the line and some pretty exotic cooling on them truthfully even the non-oc modules should end up being pretty interesting since ddr5 is also getting an spd or speed chip facelift instead of just storing default frequency and latency values which is usually going to contain both a stock and an overclocked or xmp setting it now also handles signaling to the power management ic and to any other microcontrollers on the module like RGB lighting controllers so i'm expecting that to directly result in more creative lighting implementations than we've ever seen before and lord knows that is what the industry needs more RGB i saved the best for lassie just like i saved our sponsor for last thanks to microcenter for sponsoring this video microcenter has partnered with ASUS to create a new easy to use online pc building tool that helps customers build their own computer with three different base starting points value performance or ultimate each base system will include a case with a pre-installed motherboard power supply and separately packaged graphics card you then add your choice of CPU between AMD and Intel as well as your choice of RAM storage and operating system the parts can be arranged for same day in-store pickup or for an added build fee micro center will assemble the computer for you if you're unsure of what parts you need micro center's expert technicians can walk you through selecting your components so don't wait check out micro center's new pc builder and get a free 240 gig SSD if you're a new customer at the links down below if you're looking for another video to watch maybe check out our most recent look into how memory speed impacts performance particularly in gaming"}