you know what drives me berserk memory i mean the word itself is fine actually
it's a fun game for kids an iconic song from cats and without mine i'd have a
pretty hard time making these videos but no my problem with the word memory is
the confusion that it causes ask a dozen
big box sales people how much memory you know this computer has and i guarantee
you that while some of them will tell you it has 16 gigs of RAM
others will report the capacity of the SSD or the hard drive instead and
therein lies the problem you just got potentially three different answers and
worse none of them are really quite
wrong this problem exists because most folks aren't aware that there are so
many different types of memory inside a single pc but don't worry we're going to
take care of all of that at the end of this video you'll be correctly referring
to the memory types in your pc like a champ let's start with dram what most
people are referring to when they talk about computer memory dynamic random
access memory is optimized to sit in a sweet spot where it delivers high
performance and high density or capacity at a reasonable cost ddr3 is an example
of dram and it's all volatile memory which means that once you cut power to
it anything stored in dram quickly fades
away and on top of that this is the dynamic part of the dram thing is it's
unable to retain data even while it's powered on if it's not being constantly
refreshed or rewritten the good news is that dram isn't used for long-term
storage and most of it will be set up for your CPU or graphics processor to
use as working memory that contains only the information needed to help them
complete the task at hand and nothing more so these characteristics are not
detrimental in any way next up is sram
this stands for static random access memory it's a volatile storage medium
just like dram but the key difference is that it is capable of delivering much
higher performance and that while it's receiving power it doesn't need to
refresh each bit periodically just to keep it from fading the data will wait
instead to be overwritten modern high performance cpus use sram as a way to
store the data your CPU needs most right next to it for frequent fast
access but due to its cost it's typical for
this cache to have a capacity of only a few megabytes flash memory which is a
subset of eeprom is the first type of memory in our rundown that is
non-volatile meaning that data is retained even when there is no power
being provided to the chips this feature comes with a significant performance
reduction and a limited number of
program erase or write cycles though
this is a necessary trade-off though because nandflash is used to store
things like the operating system applications and other important data
that can't be erased whenever the system is powered down in a consumer pc or
device an SSD is an example of something that uses nand flash but in spite of the
fact that i just said it has reduced performance it's still much faster than
a more traditional hard drive the only drawback here is that due to their much
higher cost compared to a hard drive typical capacities for SSD devices are
tens or hundreds of gigabytes in you know portable devices or up to a
thousand gigabytes or a terabyte in high performance computers nand flash is also
used in low cost products like usb thumb drives but the chips used for those are
much lower performance and not capable of as many program erase cycles our last
memory type is mechanical storage or the hard drive
note the use of the word storage there calling it memory is actually a bit of a
stretch even though it does store data like the other technologies we've
discussed it's very very different hard drives use a right head to store data as
a series of ones and zeros so it's still digital storage in the same way that you
know anything else is storing this data digitally but it's on a magnetic
recording layer on a disk called a platter that is spinning anywhere from
fifty four hundred to seventy two hundred times per minute around in a
typical hard drive now hard drives have been a staple of personal computers
since the 60s and while they're not nearly as fast as any of the other
memory types covered here due to the physical movement required to access
them they are still going to be important for a long time as a cost
effective mass storage medium that doesn't degrade when it's not plugged
into anything speaking of not being plugged into anything hotspot shield is
the easy and expensive way to set up a vpn solution for your pcs and devices
their elite membership which you can save 20 on by checking out the link in
the video description and using offer code Linus works for up to five devices
including iOS and Android devices it helps you maintain your anonymity online
by masking your ip address now the way a vpn accomplishes this is by rerouting
all of your traffic securely through a remote centralized server so to the
websites you're visiting the traffic appears to be coming from hotspot
shields data center but it's actually coming from you now while this
technology rerouting traffic isn't likely to improve your ping times for
gaming it does have some other benefits as well that make it worthwhile
including allowing you to access services that you otherwise wouldn't be
able to such as us netflix if you live outside of the usa so once again guys
check out the link in the video description to learn more and don't forget to use offer code Linus to save
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