WEBVTT

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many of life's biggest frustrations come in the form of bottlenecking whether

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you're stuck in traffic trying to get to work before you get fired trying to cram

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as many hot dogs as you can into your mouth for an ill-advised eating

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competition or actually building one of those little ship-in-a-bottle things but

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sometimes bottlenecks are a little bit less obvious as they often are with ssds

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lots of common tasks on an SSD might seem nearly instantaneous especially for

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users migrating from a mechanical hard drive but what if you're working with

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larger files or hitting your drive with lots of requests at once although SATA

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ssds will still give you much better performance in those situations than

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your old spinning hard drive did they're actually seriously limited in a couple

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of ways first SATA has an upper transfer limit about 600 megabytes per second

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flash storage tech used in ssds has been capable of much faster speeds for quite

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a while but because of the SATA speed limit even top-end SATA 3 drives won't

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advertise or even give you speeds higher than 600 megabytes per second max

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second SATA drives communicate with the rest of your computer using a standard

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called the advanced host controller interface or ahci and even though that

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might sound fancy in high performance hci wasn't really designed with ssds in

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mind it was more of a way to make mechanical hard drives work a bit faster

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and enable features like hot swapping these things are useful and great but

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ahci was optimized for slow read write

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heads that could only deal with so much data at a time not ssds that are capable

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of accessing tons of their own data at once drive manufacturers responded by

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rolling out ssds that use the much faster pci express bus which has a speed

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limit of nearly 4 gigabytes per second with an x4 card and connects more

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directly to the CPU than SATA reducing latency but in order to reach their

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potential they needed a faster way of accessing data than ahci

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enter non-volatile memory express or NVMe the new access standard for pci

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express ssds NVMe takes advantage of the SSD's ability to read or write lots of

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things at once by parallelizing instructions kind of like a multi-core

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processor can split certain workloads over multiple cores in order to get

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things done faster the biggest difference between NVMe and

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ahci is something called command cueing which refers to how many requests for

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data a drive can handle at one time hci

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can handle one queue at a time with up to 32 pending commands a sensible number

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for a hard drive with a slow moving head but very inefficient for a faster SSD

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NVMe relieves this bottleneck by providing over 65 000 cues that can

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handle over 65 000 commands each meaning

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NVMe drives can stay super fast even if you're throwing a ton of stuff at them

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you can find NVMe not only in ssds that plug into the pci express slot but also

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m.2 and SATA express drives which use the pc express bus you can learn more

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about those drives here before you run an upgrade though be sure your

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computer's BIOS will support it as many biases from just a few years ago don't

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actually fully recognize NVMe drives but if you're all set a shiny new NVMe drive

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will make bottlenecking a thing of the past at least until the next time you're

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waiting to be subjected to the wand of shame at the airport

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lynda.com with a lynda.com membership you can watch and learn from top experts

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like on your own pace all that kind of stuff i'm currently doing that i'm

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currently trying to learn filming and editing stuff and the teacher that i

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have for it through lynda.com is awesome and super passionate about it and it's

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actually helpful having a passionate teacher you can take notes as you go and

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if you liked the video like it sorry we were so late on an NVMe video i actually

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thought we had one if you disliked it dislike it we have a pretty cool video

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coming on Channel Super Fun very soon where we prank the crap out of Yvonne

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who is now working in office comment down below with video

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suggestions or things you'd like us to cover or things we might have missed

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like NVMe and don't forget to subscribe and follow