for decades now the clear trend in storage technology has been to make
drives as small as possible and as fast
as possible and we've gone from having four megabyte drives that are twice as
big as your average refrigerator in the 1950s to multi-terabyte ssds that are
not much bigger than a credit card yet can still move
gigabits of data per second but even as popular as those speedy two
and a half inch ssds are it became clear that with advancements in flash storage
technology we could shrink our digital repositories down even smaller without
sacrificing speed say hello my friends to m.2 a new interface for both ssds and
expansion cards that promises higher speeds and less bulk you see although
SATA 3 ssds offer huge performance gains
compared to traditional mechanical hard drives that SATA interface that cable on
the back itself has a pretty serious bottleneck topping out at about 550 to
600 megabytes per second and while that may seem very fast and indeed it is
flash storage has advanced very rapidly in recent years and is now capable of
handling data much more quickly than SATA will allow and although SATA
express which you can learn more about here was designed to alleviate this
bottleneck it is pretty difficult to
find SATA express drives on the market even though motherboards supporting it
are out there fortunately though m.2 provides the same
speed benefits as SATA express with the extra advantage of being much much
smaller and more versatile many m.2
drives actually utilize your computer's pci express bus with the fastest m.2
drives currently on the market using a pci express 3.0 x4 connection
translating to a theoretical maximum of four gigabytes per second
and although you probably won't see real world speeds quite that high especially
not right now current m.2 PCIe drives
will still be much faster than a regular SATA SSD and should continue to get
faster in the future m.2 is also useful for things other than
storage devices you can get wi-fi and bluetooth cards that will fit into your
motherboard's m.2 slot and take advantage of pci express speeds without
having a you know large card plugged in or a dongle hanging out of your case and
even if you're just using m.2 for storage you still get the additional
benefit of not having to mess around with any power or signal cables slot in
the card put in a screw and you are good to go but
before you rush out to buy a new m.2 SSD or wireless adapter or whatever remember
this not all m.2 cards and slots are the
same faster m.2 drives will utilize the
newest version of pci express that is 3.0 as of right now as well as the new
NVMe standard for interacting with the rest of the system so be sure to check
for these things before you buy especially as some m.2 drives use PCIe
2.0 the older ahci protocol or even the
existing SATA bus so they're basically just an msata card that fits in an m.2
slot so in the case of that last one you won't see any performance benefit at all
and you also have to pay attention to the physical layout of the card unlike
SATA m.2 even though it only has one name uses several different connector
types so most m.2 slots on current
motherboards use either connectors b or
m for ssds and a or e for wireless
adapters now some cards are actually
compatible with multiple motherboard connectors so just make sure that
whatever you're buying you are checking before you pull the trigger and then
finally size matters with m.2 every m.2 card
regardless of its connector type will have a number indicating its dimensions
such as 2242 which means that it's 22 millimeters by 42 millimeters just so
just like how some cases will only fit graphics cards up to a certain length
some motherboards and notebooks aren't compatible with longer m.2 devices
so i guess the final word is this although there may be more to remember with m.2
the extra speed and flexibility is
probably worth having to pay a little bit of attention that is to say unless
the thought of leaving all 10 of those drive cages in your unnecessarily large
gaming tower unused makes you feel sad
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