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Flashcards: CompTIA A+ Core 1: Memory
Define and describe RAM
Random Access Memory, is volatile memory where information is not permanently saved, used to hold information relevant to real-time processes
Define and describe DIMM
Dual Inline Memory Module, the module of RAM with a 64 bit data width
Define and describe SODIMM
Small Outline DIMM, a smaller form factor of RAM used primarily in mobile devices
Define and describe DRAM
Dynamic RAM, is the memory on a DIMM, it is refreshed constantly otherwise the stored data vanishes
Define and describe SDRAM
Synchronous DRAM, is RAM that is synchronous with the system clock so that it can queue processes
Define and describe SDR and DDR
Single Data Rate and Double Data Rate, are standards for the data speeds of RAM with DDR being twice as fast
How does DDR achieve higher speeds than SDR?
DDR is able to process 2 datasets within a single clock cycle
What is the maximum size per DIMM of DDR3?
16GB
What is the maximum size per DIMM of DDR4?
64GB
What is the maximum size per DIMM of DDR5?
64GB
True or False: DDR generations are backwards compatible
False - The key location moves between generations and motherboards are designed for a single transfer speed
Define and describe VRAM
Virtual RAM, is a technology that allows swapping of unused application data to storage to free up additional memory space
What is Multi-Channel Memory?
Using multiple RAM slots to decrease the workload on individual DIMMs
Define and describe ECC Memory
Error Correcting Code Memory, is a RAM type that reserves space for error checking and correction, some RAM uses parity to reduced effect