so you've bought some shiny new RAM sticks for your computer you've made
sure that they're the right speed and they're the right voltage and you even
paid extra for that sick RGB lighting bro but when you furiously rip off the
packaging and are just about to insert the modules into your motherboard you
notice a strange sequence of numbers on
the stickers and start wondering what those mean is there some crucial
specification you've missed before buying your RAM these numbers here are
called memory timings and they are one of the factors that determine the
performance of a d module but how does
that work doesn't RAM frequency in
megahertz already tell us how fast it goes not quite while the clock speed can
tell us how much data your RAM can send and receive per second it doesn't tell
us anything about latency the delay between operations which you can learn
more about up here that is where timings come in they give you information about
how quickly memory can be accessed before the data starts flying around
let's start with the first number in the string this is called cast latency this
is the time it takes for the RAM module to start responding to a request for
data measured in clock Cycles in general
this means that a lower cast latency is better but because different RAM modules
run at different clock speeds you have to consider them together with the
frequency to find the total real world
latency in Nan seconds using this formula so check this out slower clocked
RAM can effectively be quicker if it has a lower cast latency something to keep
in mind when buying your memory though remember your speed is still going to be
more important generally speaking but what about those other numbers the
second is a mouthful row address to column address delay or trcd you see RAM
is set up in a grid and your computer needs to access a particular row before
finding which column of that row has the piece of data that it wants so this
number expresses the small delay between row and column access the third number
is row pre-charge time or trp referring to the latency involved in opening a new
row and the fourth is row active time or
TR the minimum number of clock cycles that a row must stay open to ensure the
data is read or written properly that's
why this one is longer than your other timings and how does all of this affect
the way that you configure your RAM modules when you first slot them into
your motherboard most modern bioses will have a pre-loaded XMP profile that you
can enable to ensure that these modules are running at their rated speed voltage
and timings but if you want to get the fastest speeds possible you can actually
lower or tighten your timings then run a
stress test like me test 86 plus to validate that your changes aren't
causing any system instability I would recommend changing each of the first
three numbers by an increment of one and then validating in between perhaps
giving your RAM or memory controller a bit more voltage if things look unstable
but to be sure check Intel or AMD's recommended voltages to make sure you're
not going too high once you've done that adjust your TR accordingly and you're
pretty much done once your RAM is stable although it's been a while since
tightening timings has given a noticeable real world performance boost
in most applications early reports are
indicating that RAM speeds matter far more with AMD's new ryzen Chips than on
the Intel side so if you really want to dive into the world of Enthusiast
tinkering and you've got a ryzen based system you might want to give adjusting
your timings a shot at the very least it'll be something else to experiment
with if you've ever gotten tired with playing with the RGB effects on your
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Linus all right guys thanks for watching if you like the video like it if you
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