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main memory

Low
UK/ˌmeɪn ˈmeməri/US/ˌmeɪn ˈmeməri/

Technical, Academic, Professional (Computing)

My Flashcards

Definition

Meaning

The primary, internal, high-speed storage area in a computer where the operating system, applications, and data in current use are kept so they can be quickly accessed by the processor (CPU). It is volatile, meaning it loses its contents when power is turned off.

In broader cognitive science or psychology, it can metaphorically refer to the primary, active storage of information in the human mind, as opposed to long-term memory.

Linguistics

Semantic Notes

Contrasts with 'secondary storage' (hard drives, SSDs) and 'cache memory'. The primary term in IT. Also referred to as 'primary storage'.

Dialectal Variation

British vs American Usage

Differences

No major differences in meaning or usage. Spelling conventions for related software/hardware descriptions follow regional norms (e.g., 'programme' vs. 'program').

Connotations

Purely technical and neutral in both regions.

Frequency

Equally common and standard in technical contexts in both BrE and AmE.

Vocabulary

Collocations

strong
access main memoryload into main memorymain memory capacitymain memory modulemain memory bus
medium
amount of main memorysufficient main memorymain memory managementmain memory speedupgrade the main memory
weak
computer's main memorydata in main memoryfaster main memorymain memory is full

Grammar

Valency Patterns

NOUN + main memory (system main memory)main memory + VERB (main memory stores/runs)ADJ + main memory (volatile main memory)main memory + NOUN (main memory size)

Vocabulary

Synonyms

Strong

RAMprimary memory

Neutral

primary storageRAM (Random Access Memory)system memoryphysical memory

Weak

internal memoryworking memory

Vocabulary

Antonyms

secondary storagehard disk driveSSDexternal memorylong-term storage

Phrases

Idioms & Phrases

  • “[none directly; the term itself is technical]”

Usage

Context Usage

Business

"For this software to run efficiently, your company PCs need a minimum of 16GB of main memory."

Academic

"The study analysed the effects of cache size on latency for accesses to main memory."

Everyday

"My laptop is slow because it doesn't have enough main memory for all the programmes I have open."

Technical

"The DMA controller facilitates data transfer between the I/O device and main memory without CPU intervention."

Examples

By Part of Speech

verb

British English

  • The programme will main-memory the dataset for faster processing.
  • It's not efficient to main-memory the entire catalogue.

American English

  • The system will main-memory the most active threads.
  • We can't main-memory files of that size.

adverb

British English

  • The data is stored main-memory for speed.
  • It runs main-memory resident.

American English

  • The process executes main-memory fast.
  • The table is kept main-memory only.

adjective

British English

  • This is a main-memory database architecture.
  • The main-memory limitations are a bottleneck.

American English

  • They developed a main-memory computing system.
  • The main-memory footprint of the application is large.

Examples

By CEFR Level

A2
  • A computer needs main memory to work.
  • More main memory makes a computer faster.
B1
  • My new computer has 8 gigabytes of main memory.
  • If the main memory is full, the computer becomes very slow.
B2
  • Upgrading the main memory is often the cheapest way to improve an older PC's performance.
  • The application loads essential files into main memory when you start it.
C1
  • Modern in-memory databases leverage vast amounts of main memory to achieve unprecedented transaction speeds.
  • The processor's cache acts as a high-speed buffer between the CPU cores and the slower main memory.

Learning

Memory Aids

Mnemonic

MAIN MEMORY: Think of it as your computer's MAIN desk where it does all its current WORK (like RAM). The hard drive is the filing cabinet (long-term storage) across the room.

Conceptual Metaphor

MEMORY IS A WORKSPACE (main memory is the active desk; storage is the archive).

Watch out

Common Pitfalls

Translation Traps (for Russian speakers)

  • Avoid translating as 'главная память'. The standard IT term is 'оперативная память' (ОЗУ).
  • Do not confuse with 'постоянная память' (ROM) or 'виртуальная память' (virtual memory).

Common Mistakes

  • Using 'memory' alone ambiguously (could be RAM, cache, or storage).
  • Confusing 'main memory' (RAM) with storage space on a hard drive.
  • Spelling as one word ('mainmemory').

Practice

Quiz

Fill in the gap
When you turn off your computer, all the data stored in is lost.
Multiple Choice

Which of these is a direct synonym for 'main memory' in a computing context?

FAQ

Frequently Asked Questions

Yes, in nearly all modern personal computing contexts, 'main memory' is synonymous with RAM (Random Access Memory). It is the volatile, high-speed memory directly accessible by the CPU.

When main memory (RAM) is full, the operating system starts using a portion of the hard drive or SSD called 'virtual memory' or a 'swap file'. This process is much slower than using RAM, causing significant system slowdown.

In most desktop and many laptop computers, yes. You can typically add more RAM modules or replace existing ones with higher-capacity ones, provided the motherboard has available slots and supports the upgrade.

Main memory (RAM) is fast, volatile memory used for temporary data the CPU is actively working on. Storage (HDD/SSD) is slower, non-volatile memory used for long-term file and programme storage even when the power is off.