Whenever you come to know about the RAM, you hear it is
volatile memory. Data on RAM can be recovered in certain condition or not? Let
know this.
RAM is
Semiconductor based volatile memory, used as temporary memory for processing
our data but for CPU its main memory. Once we switched off the computer, all
the data loaded in computer’s RAM will be vanished. But as I studied little
deeper I got something that I like to share with you Intelligent Readers.
For your information,
RAM is consisting of small units called cells having mainly two components,
Transistor and Capacitor. These capacitors either contain electrical charge (bit
value 1) or no charge (bit value 0).
Transistor mainly
controls the charging and discharging of these capacitors thus connected to two
electrical lines called word line and bit line. During the reading/writing
processor of CPU first activate the word line to make Transistor permeable.
While writing the data bit to the capacitor, CPU transport all the data through
the bit line. With the potential of the lines these charges are align in
capacitor which corresponds the value 0 or 1. Capacitor always de-allocates the
charges in the bit line during every writing process. Yet the rise and fall in the
potential depending on the capacitor is loaded or not. After this CPU get able
to interpret these as 0 or 1.
A fully loaded
capacitor can hold around 100,000 electrons only. This minor electrical charge
can be easily cleared very fast even by leakage surrounded by material around
the chip. Thus internal memory needs refreshment at interval of every 15 microsecond,
which means several thousand per second.
These memories not
empty in millisecond, some discharge slower, some faster. Even most of the bit
can survive at even room temperature for even 2 seconds.
Now but if we cool
down the material and environment of the cells, suppose up to minus 50 degree
Celsius, charge can be retained to much longer time.
I trial experiment,
computer is made sleep to standby mode, after this Cooled RAM is removed from
the socket, after many seconds it was again pulled to the socket and computer
is waked up.
Amazing, everything
was same every data inside RAM was retained.
I am not expecting security
issue or any other uses, but I just found out, theoretically and even
practically it is possible to retain the data/content in RAM even after the disconnection
from main System.
Hope this added a
lot in your previous thought and made a new awareness for you all.
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