System Memory Flashcards
(RAM) stands for?
Random Access Memory
(RAM)
Used to load applications and files into a non-persistent and fast storage
area
Cache
High-speed memory
Storage
▪ Mass storage device that holds more data but is slower than a cache
Mass Storage Devices
Permanent storage area
o Random Access Memory (RAM) / System Memory
Temporary storage area/non-persistent storage
Disk Cache
Pulls the files from the disc into memory and replaces the old file
Mechanical system
▪ Uses an electronic system that can access the RAM with instant speed
Addressing Memory
▪ Processor reaching the files inside RAM:
Single Channel Memory Controller
32 or 64 bits
x86
o 32-bit
● x64
64-bit
▪ An x86 or 32-bit processor can address a maximum
of 4 GB of RAM
▪ An x64 or 64-bit processor can access more than 4
GB of RAM (8, 16, 32, or 64 GB)
Memory Modules:
Single Bank
▪ Can put any size of module in any slot
● Dual Inline Memory Module (DIMM)
o With 240 or 184-pin connector
Dual Data Rate (DDR)
▪ Most common type of memory
● PC133
o 133 MHz
Throughput
Calculated based on the bus speed and the width of the data bus
Dynamic RAM (DRAM)
▪ Oldest type of memory that requires frequent refreshing
● DRAM storage cell is dynamic
Synchronous DRAM (SDRAM)
First memory module that operates at the same speed as the
motherboard bus (168-pin connector)
Synchronous DRAM (SDRAM) types/speed
● PC66 (66 MHz bus)
● PC133 (133 MHz bus)
● PC266 (266 MHz bus)
(DDR SDRAM)
Double Data Rate Synchronous Dynamic Random-Access Memory
Doubles the transfer speed of an SRAM module (184-pin connector)
(DDR SDRAM)
(DDR2
SDRAM)
o Double Data Rate 2 Synchronous Dynamic Random-Access Memory
Higher latency and has faster access to the external bus (240-pin
connector) type / speed
PC2-4200
o 4200 MB/s or 4.2 GB/s
(DDR3
SDRAM)
Double Data Rate 3 Synchronous Dynamic Random-Access Memory
