WEBVTT

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thanks for watching techwiki click the subscribe button then enable

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notifications with the bell icon so you won't miss any future videos so you've

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finally decided to address a huge bottleneck in your computer by upgrading

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to an SSD for your boot drive but when you finally get up and running

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something seems a little off maybe your file transfers are slower than you

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expected underwhelming SSD performance could be

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caused by a somewhat obscure setting in

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your UEFI BIOS you see most modern hard

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drives or ssds can be set to operate in

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either ide mode or ahci mode but what in

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the heck does that mean well there are multiple ways your system

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has of talking to drives

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ide or parallel ata is the standard that

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was used for a long time back when we were all using those huge gray ribbon

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cables to connect hard drives to motherboards

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drives with the newer smaller SATA or

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serial ata connectors that most of us use today can also utilize a newer

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standard called advanced host controller interface or ahci

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ahci enables cool features like hot

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swapping so you don't have to turn off your computer if you want to

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unplug an external drive from an esata port or use that super neato hot swap

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bay in the top of your case a less obvious but also important advantage is

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support for native command cueing which

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affects the way that your drives handle multiple requests to fetch data at one

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time

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on hard drives using ncq can mean the drive's read and write head doesn't have

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to move around as much to get a certain

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piece of information speeding up your access times

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but how does ahci also help speed up ssds

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well although the benefits of ncq on ssds are small or negligible for home

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users many users do report greatly

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increased performance especially for large file transfers in ahci mode

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compared to ide mode due to hci just

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plain being designed with more modern drives in mind

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so then why would you ever want to use ide mode

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can we just get rid of that option well if you're running an older

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operating system such as Windows xp or earlier there's a good chance that it

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won't have native hci support meaning it

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won't play nicely with your drives if your motherboard is set to hdi mode

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unless you do some software trickery when you install the os this might also

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be the case if you're trying to run software from a bootable usb stick or an

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optical disk and if you have a boot drive that you've

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been using in ide mode but then switch over to ahci you might get a boot error

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forcing you to switch back to ide though fortunately if you're using Windows

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there's a registry tweak that you can use to fix this more permanently if

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you're interested we've linked instructions in the video description

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below of course ahci isn't the end game for

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drive protocols and the sexy new one nvm

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express is starting to gain popularity while you won't be able to use it with

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garden variety SATA drives it's being implemented in high performance pci

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express ssds and since NVMe was designed

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from the ground up for solid-state storage it can enable speed several

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times faster than what you'd get with ahci on a standard SATA interface so you

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might want to look into those if you've got some money to burn and milliseconds

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count when you're trying to frantically open google chrome to watch the latest

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exciting installment of Techquickie speaking of doing things frantically do

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you find yourself racing around trying to get all of your work done and then

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collapsing exhausted in your computer chair trying to fight your way through

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horrible accounting software well if you're a freelancer or a small

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techwiki in the how did you hear about us section

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so thanks for watching guys like dislike leave a comment with suggestions for

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future videos subscribe and don't forget to press the little bell so you get all

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our notifications and we will see you again in the next Techquickie exciting

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