hi guy welcome back to Relax tech
channel I have a raspberry pi  four
this is the latest version of raspberry 
. There is  not much change about hardware
except an eight  Ram, but there are a lot of
change about the software that Raspberry
Pi I have to release the new OS that's
supported 64 bits because on the 32-bit
OS a single application cannot use  more
than 3 gigabytes of RAM so on this video I
will have a quick preview about this feature, let get start
if this is the first t time you hear about
Raspberry  PI I would like to summarize
what Raspberry change on each version so you will have a bigger picture about
Raspberry PI , this is a first verson named
Raspberry Pi One.
to power the board we needed Type C USB cable along with a normal and after
or we can buy an office or adapter from
Raspberry
if we're running the normal application
it very difficult to run it 100% up CPU
so to do that I write a small program in C language.
basically, the RAM just keep polling the
CPU so let's see how the application
work
even we have a gigabytes of RAM but we
are burning on 32-bit operating system
there are the limitation that we cannot
do more than three gigabytes of RAM for
a single application so to verify is it
correct or not I write a small program
in and C then with basically the program
keep allocating memory without freedom
so let's check how the application
running on the Left terminal I run a
stop command to monitor the CPU and the
memory uses and you can see the system
is you more than 300 megabytes of RAM
that not so so so much on the right
Tommy no I run my application and you
can see the memory increased loosely and
then suddenly stop at 3.2 gig by so the
limitation is correct if you want your
application you more than three
gigabytes of RAM you have to install the
city for bit operating system
I interview the P we feature from pi/3
amount of B plus and now we also have
the feature on the ruble in PI for this
feature should check to support the
power through the Ethernet cable to do
that you need to have the P we power
adapter and one side of the ethernet
cable will fall into the power adapter
and the other side we plug into the
Raspberry Pi there are the 4 pin heater
on the Raspberry Pi for you can get the
contact from Ethernet cable by using an
accessory we convert it for the a1 into
5 volt and then we power our relatively
PI ball without a power cable
you
