System Memory Flashcards
OBJ 3.2: Given a scenario, install the appropriate RAM
Used to load applications and files into a non-persistent and fast storage area
Random Access Memory (RAM)
High-speed memory
Cache
Mass storage device that holds more data but is slower than a cache
Storage
Permanent storage area
Mass Storage Devices
Temporary storage area/non-persistent storage
Random Access Memory (RAM) / System Memory
Pulls the files from the disc into memory and replaces the old file
Disk Cache
Uses an electronic system that can access the RAM with instant speed
Mechanical system
Processor reaching the files inside RAM
Addressing Memory
configuration where your CPU has access to a single 32 or 64-bit wide bus to access memory
Single Channel Memory Controller
An x86 or 32-bit processor can address a maximum
of ___ of RAM
4GB
An x64 or 64-bit processor can access _____ of RAM
8, 16, 32, or 64 GB
RAM module with one set of memory chips that can be accessed by the memory controller at a time, limiting parallel data access compared to other designs
-Dual Inline Memory Module (DIMM)
o With 240 or 184-pin connector
Single Bank Memory Module
Most common type of memory
● PC133
o 133 MHz
Dual Data Rate (DDR)
Calculated based on the bus speed and the width of the data bus
Throughput
Oldest type of memory that requires frequent refreshing
-storage cell is dynamic
Dynamic RAM (DRAM)
▪ First memory module that operates at the same speed as the
motherboard bus (168-pin connector)
● PC66 (66 MHz bus)
● PC133 (133 MHz bus)
● PC266 (266 MHz bus)
Synchronous DRAM (SDRAM)
Doubles the transfer speed of an SDRAM module (184-pin connector)
Double Data Rate Synchronous Dynamic Random-Access Memory (DDR SDRAM)
Higher latency and has faster access to the external bus (240-pin
connector)
● PC2-4200
o 4200 MB/s or 4.2 GB/s
Double Data Rate 2 Synchronous Dynamic Random-Access Memory (DDR2 SDRAM)
Runs at a lower voltage and at a higher speed than DDR2 (240 keyed pin connector)
● PC3-10600
o 10600 MB/s or 10.6 GB/s
-throughput is 6.4 to 17 GB/s with a maximum module size of 8GB
per memory module
Double Data Rate 3 Synchronous Dynamic Random-Access Memory (DDR3 SDRAM)
Classified as DDR3, DDR4, or DDR5
-smaller form factor
Small Outline Dual In-line Memory Module (SODIMM)
Uses two different memory modules to increase the performance and throughput
Multi-Channel Memory
Uses one memory module on one bus (64-bit data bus)
Single-channel Memory
Requires two memory modules and two memory slots on the
motherboard (128-bit data bus)
▪ Interleaving
● Provides increased performance
Dual-channel Memory
Uses three memory modules and three memory slots (192-bit
data bus)
Triple-Channel Memory
Uses four memory modules and four memory slots (256-bit data
bus)
Quad-Channel Memory
Gives faster speeds and add memory for storage
multiple modules
Standard memory that does not check for errors and allows data to be put in or taken out
Non-Parity Memory
Performs basic error checking and ensures the memory contents are reliable
● does basic calculation
o Every bit has an associated parity bit
▪ Bits can only be a zero or one
Parity Memory
Detects and corrects an error
-some motherboards will support this
Error Correcting Code (ECC
Additional hardware (register) between memory and CPU
● The system requires buffering or registering the data to reduce
the electrical load
Buffered / Registered Memory
Has an internal error checking for its modules
● can still be sold as ECC or non-ECC modules
DDR5
Space on a hard drive that is allocated by the OS and pretends to be
memory
● Check the available memory and the free memory
Virtual Memory/Page File
A file that is hidden on a storage device and pretend as system memory
Page File or Swap Space
