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How does Computer Memory Work?

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Questions and Answers

Which type of memory is used for long-term storage in a computer?

Dynamic Random-Access Memory (DRAM)

Central Processing Unit (CPU)

Working Memory

Solid-State Drive (SSD) (correct)

What is the main function of DRAM in a computer?

To display the loading bar

To move data from SSD to DRAM

To temporarily store data for the CPU to work with (correct)

To permanently store data

Which memory type is faster: DRAM or SSD?

SSD

It depends on the size of the memory cells

DRAM (correct)

They have the same speed

Which part of the memory channel carries an address specifying where to read or write data?

Address wires Signup and view all the answers

How many bits are used to select the bank group in the memory chip?

3 bits Signup and view all the answers

How many memory cells are there in each bank of the DRAM microchip?

65536 cells Signup and view all the answers

What is the process of moving data before it's needed called?

Prefetching Signup and view all the answers

How many nanoseconds does it take for electricity to travel across a room?

17 nanoseconds Signup and view all the answers

What is the purpose of precharging the bitlines?

To open a row Signup and view all the answers

Which part of the address is called RAS?

Row address Signup and view all the answers

Which part of the 1T1C memory cell stores one bit of data?

The capacitor Signup and view all the answers

Why are banks significantly taller than they are wide?

To increase the efficiency of reading and writing Signup and view all the answers

What is the voltage applied and stored in each capacitor for a binary 1 during writing or refreshing in DDR5?

1.4 volts Signup and view all the answers

How long does it take to refresh all the rows in a bank of DRAM?

3 milliseconds Signup and view all the answers

What does the first number in the timing parameters on a package of DRAM refer to?

The time it takes between sending an address with a row open to receiving the data stored in those columns Signup and view all the answers