Section 5 - System Memory Flashcards
What is Random Access Memory (RAM) used for
Used to load applications and files into a non-persistent and fast storage area
What is a mass storage device
Permanent storage area
Define
RAM / System Memory
Temporary storage area/ non persistant
What is disk cache’s function
Pulls the files from the disc into memory and replaces the old file
What does a mechanical system use
An electronic system that can access the RAM with instant speed
Explain Addressing Memory
Processor reaching the files inside RAM
32-bit (x86)
4(2^32) billion address locations (4gb of data)
64-bit (x64)
184 quintillion address locations (16 EB(Exabytes) of data)
What is the max ram a x86 aka 32-bit processor can address
4GB
What is the max ram a x64 aka 64-bit processor can address
> 4GB of RAM
Explain Single Bank (RAM)
Any size modules in any slot
Explain Paired Bank (RAM)
Requires installation of bank in pairs
RAM Versions (Abbreviation)
DDR3,4,5(Dual Data Rate)
What bus speed does PC133 run at
133 MHz
Explain throughput in regards to ram
Calculated based on the bus speed and the width of the data bus
Explain Dynamic RAM (DRAM)
Oldest type of memory that requires frequent refresh
Explain Static RAM (SRAM)
Solved the issue of the constant refresh, but it was expensive
DRAM Storage characteristic
It is dynamic
What speed does the PC166 Bus have
166 MHz
What speed doe the PC266 Bus use
266 MHz
Double data rate synchronous dynamic random-access memory (DDR SDRAM)
Doubles the transfer speed of an SRAM module (184-pin connector)
Double data rate 2 synchronous dynamic random-access memory (DDR2 SDRAM)
Higher latency and has faster access to the external bus (240-pin connector
Double data rate 3 synchronous dynamic random-access memory (DDR3 SDRAM)
2 Improvements
Runs at a lower voltage and at a higher speed than DDR2 (240 keyed pin connector)
What is DDR3’s throughput
6.4 to 12.8 GB/s with a max module size of 8GB/module n max
What is DDr4’s throughput
12.8 to 25.6 GB/s, 32GB/module max
What is DDR5’s throughput
25.6 to 51.2 GB/s of throughput max of 128GB/module
Explain mix and matching of modules in terms of RAM
It’s possible provided its the same type, the speed doesn’t HAVE to be the same
Explain mix and matching for multiple modules
Buy them in pairs with same brand, speed and throughput
Explain what Small Outline Dual In-Line Memory Module is (SODIMM)
still classified as DDR3,4,5
Explain SODIMM PC4-16000 in terms of speed
16000 MB/s AKA 16GB/s
What does Multi-Channel Memory do
The use of multiple memory sticks working together
EXplain Single channel memory
64-bit data bus
Explain Dual-channel memory
128-bit data bus
What does interleaving result in
increased performance
Explain Triple-Channel memory
Using 3 sticks resulting in a 192-bit data bus
What are the most commonly used ram-channels
single,dual,triple,quad
What should you do before implementing ramp into your motherboard and why
Check the motherboard’s manual as just because your board has 4 slots, doesn’t mean it can go up to quad, may just be dual
What is considered best practice in multi-channel configs?
using the same model, speed and throughput of memory
What do multiple modules allow for
Faster speeds and additional memory for storage
Explain Non-parity memory
Standard memory that doesn’t check for errors and allows data to be put in or taken out
Explain Parity memory
Performs basic error checking and ensures the memory contents are reliable (slower than non-parity)
What does it mean if memory does a parity check
Does a basic calculation
What does every byte have
An associated parity bit
What does an odd number refer to
1 Parity bit
What does an even number refer to
0 parity bit
Explain Error correcting code (ECC)
Detects and corrects an error
Explain Buffered / Registered Memory
Additional hardware (register) between memory and CPU
What does the system require to reduce electrical load
Buffering or registering to use on the data
What components need to support ECC for it to be used
CPU & Motherboard
What does DDR5 have compared to its predecessors
Some level of internal error checking (Different form of error checking)
What forms of DDR5 can be sold
ECC or Non-ECC
Explain Virtual Memory/Page file
space on a hard drive that is allocated by the OS and pretends to be memory
What are the 2 types of virtual memory
windows : page file linux,unix,mac: swap space
A page file/swap space is
hidden on a storage device and pretends to be system memory
What will the the OS do to processes
Assign memory locations to different processes in 4KB-size chunks
PC5-42000 (DDR5 Module)
42000MB/s
42GB/s
