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Computer Memory Revision Flashcards
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- 1RAM - It stands for Random Access Memory. It is a volatile storage. It stores data as long as the computer is on. Extra RAM can improve computer performance.ROM -
It stands for Read Only Memory. It is a non volatile storage. Data stored in ROM can only be modified very slowly so therefore it is used for firmware or application software. It contains BIOS instructions. - 2KEYWORDS - CPU : Central Processing Unit VOLATILE - Gets emptied when the computer is turned off. FIRMWARE - Permanent software programmed into ROM NON VOLATILE - Doesn't loose the data when the device is turned offBIOS - Basic input / output system contains programs to load the hardware
DISK THRASHING - When a computers virtual memory subsystem is in a constant state of paging. - 3Virtual Memory - Virtual memory is simply an area of secondary storage that is used like RAM It is only a temporary storage. It is located on the hard disk.DRAM - Dynamic Random Access Memory
This requires constant power to store data.
SRAM - Static Random Access Memory
This doesn't require / need constant power to hold onto data - 4VOLATILE - Only stores information to run programs while the PC is on. Reset when the PC IS turned off. Requires electricity to store data using transistors and capacitors.NON-VOLATILE:
Retains data even when the computer is off.
Examples in old computers : paper, punched tape and floppy disks. - 5Memory is the area where the computer stores or remembers data. Memory provides the CPU with its instructions.AKA Primary Storage. Latency is the time for component to respond to a requestComputers require an input hardware, processing hardware and output hardware.
CPU - executes programs using the fetch-decode-execute cycle.
Storage- stores programs and files long term, even when not in use. Types include : USB, SB Cards, Hard Drives and SSDS.
Memory - Stores program operations and data while the program is being executed. TYPES : Register, cache, RAM, ROM and Virtual Memory.
Graphics - Using the GPU to render images, frees up the CPU for other tasks (most computers have a separate GPU and CPU)
Benchmarking - A test used to access the performance of a computer. Different types of software are used depending on the computers purpose.
Performance - CPU Speed (cycles per second) measured in Hertz - 6—
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- Year 10 IT Fichas sobre Computer Memory Revision Flashcards, creado por Casey Morris el 22/11/2017.
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- Casey Morris
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