RAM on Android: everything you need to know about RAM in a smartphone

Have you ever noticed how your Android smartphone starts to “slow down” after opening several applications? Or why new flagships are equipped with 12–16 GB of RAM, when older models managed with 2–4 GB? The answer lies in one of the key components of any device - RAM (random access memory). But what is it in practice, how does it work in Android and why is it not enough even on powerful phones?

In this article we will figure out how RAM differs from permanent memory, how Android manages RAM, why it is “eaten up” by background processes and what to do if your smartphone constantly displays the “Not enough memory” notification. You will also learn how to check RAM usage, what myths about “cleaning memory” harm the device, and why Greenify or CCleaner do not always help. We’ll also debunk the popular stereotype that “the more RAM, the better.”

If you want to understand how your smartphone works from the inside and how to use its resources as efficiently as possible, read on. We will do without complex technical terms, but will give clear instructions and practical advice.

What is RAM and how does it differ from permanent memory

RAM (random access memory, or RAM — Random Access Memory) is the “desktop” of your smartphone. Data that the device works with is temporarily stored here: open applications, browser tabs, games, system processes. As soon as you close the application or turn off the phone, the RAM is cleared. right now: open applications, browser tabs, games, system processes. As soon as you close the application or turn off the phone, the RAM is cleared.

Unlike RAM, persistent memory (or ROM, also known as internal storage) stores data for a long time: photos, videos, installed apps, system files. Even if you turn off your smartphone, this data will not go anywhere. For example, when you install a game from Google Play, it is saved in permanent memory, but the game process (textures, progress, physics) is loaded into RAM during startup.

• 📱 RAM: temporary memory for active tasks. Access speed is nanoseconds. Cleared when turned off.
• 💾 Read-only memory (ROM): long-term file storage. Access speed is microseconds. Data is retained.
• 🔄 Cache: intermediate buffer to speed up repeated access to data (for example, cached pages in the browser).

Why is this important? Because many users confuse “not enough memory” (meaning RAM) with “running out of space on the phone” (retention memory). For example, if you have 128 GB of internal memory and 8 GB of RAM, then the message “Not enough memory to open an application” almost always refers to RAM, and not to the free space for photos.

How Android manages RAM

Android uses dynamic RAM allocation: the system itself decides which processes to leave in memory and which to close. Unlike Windows, where the user can manually manage tasks, Android tries to optimize resources as much as possible automatically. Here's how it works:

1. Process prioritization: Android ranks tasks by importance. For example, the active application (the one you see on the screen) has the highest priority, and the background ones have the lowest.
2. Killing processes (LMK): if the RAM runs out, the mechanism Low Memory Killer (LMK) is triggered, which forcibly closes the least important processes.
3. Caching: free RAM is used to cache frequently used data (for example, previously launched applications open faster).

Interesting fact: if you see that 70-80% of RAM is occupied in the task manager, this is normal. Android specifically keeps applications in memory so that they open faster when launched again. Empty RAM is inefficiently used resources.

Process state	Priority	Example	Probability of closing LMK
Active (foreground)	Maximum	Open application on screen	Never
Visible (visible)	High	Multitasking application (for example, paused video)	Low
Service	Medium	Background mail synchronization	Medium
Cached	Low	Closed application, but not deleted from memory	High
Empty (empty)	Absent	No active processes	—

Many users mistakenly think that they need to constantly “clean RAM” using optimizers. In fact, manually clearing the memory unnecessarily can worsen performancesince Android will have to reload the data into RAM the next time you open the application.

How much RAM is needed for Android in 2026

The amount of RAM in smartphones has increased from 512 MB in 2010 to 24 GB in 2026 flagships. But are such volumes really needed? It all depends on the usage scenario:

• 📞 2–4 GB: basic tasks (calls, instant messengers, social networks). Suitable for budget models or older users.
• 🎮 6–8 GB: games (Genshin Impact, Call of Duty Mobile), multitasking (for example, simultaneously YouTube + cards + chat).
• 💻 12–16 GB: professional tasks (video editing in CapCut, emulators Windows), future durability for 3–4 years.
• 🚀 16+ GB: marketing ploy. There is no real benefit for most users, but it is useful for enthusiasts (for example, launching Linux through Termux).

It is important to understand that volume RAM itself does not guarantee smooth operation. processor (a weak chipset will not be able to quickly process data even with 12 GB of RAM).. Much more important:

• 🔧 Firmware optimization (for example, MIUI from Xiaomi often consumes more RAM than OxygenOS from OnePlus).
• ⚡ Processor performance (a weak chipset will not be able to quickly process data even with 12 GB of RAM).
• 🗑️ The presence of “garbage” processes (some manufacturers load unnecessary services into the system).

Example from life: a smartphone Samsung Galaxy S23 with 8 GB of RAM works smoother than Redmi Note 12 Pro+ with 12 GB, because the firmware One UI is better optimized than MIUI.

How to check RAM usage on Android

To learn how much RAM is used and which applications are consuming it, you do not need to install third-party utilities. Most smartphones have built-in tools:

1. Open Settings → Device care → Memory (on Samsung) or Settings → Applications → Memory usage (on “pure” Android).
2. Tap on RAM or RAM usage.
3. You will see a graph of memory usage and a list of processes sorted by consumption.

On some devices (for example, Xiaomi or Realme) the path may differ: Settings → About phone → Memory status or Settings → Advanced → Memory manager.

If the built-in tools are not enough, you can use third-party applications:

• 📊 Simple System Monitor (displays RAM, CPU, network usage in real time).
• 🔍 DevCheck (shows detailed information about hardware, including RAM type and frequency).
• 🛠️ CPU Monitor (monitors CPU load and memory).

How to enable the display of RAM usage in the notification panel?

On some firmware (for example, ColorOS or MIUI) you can add a RAM monitoring widget to the notification shade. To do this, swipe down from the top edge of the screen → click on the “⚙️” or “✏️” icon → find the “Memory Usage” widget and drag it to the active area.

Please note: if you see unknown names in the list of processes (for example, com.android.abc), do not rush to close them. Many system services are necessary for stable operation of Android. For example, com.google.android.gms is Google Play Services, without which many functions will not work.

⚠️ Attention: Some applications for “cleaning RAM” (for example, Clean Master or DU Speed Booster) may show false warnings about memory overload to motivate you to buy the premium version. Android itself knows how to manage resources - don’t trust such utilities.

Why Android “eats” RAM and how to fix it

If your smartphone is constantly slowing down, and the task manager shows 90% of the RAM load, this is not always a problem. Android was designed to make the most of available memory. However, there are situations where high RAM consumption really harms performance:

• 🦠 Viruses or malware: some Trojans disguise themselves as system processes and load memory.
• 🤖 Poorly optimized applications: for example, Facebook or TikTok can consume up to 1 GB of RAM in the background.
• 🔄 Memory leaks: bugs in firmware or applications lead to processes not releasing RAM after closing.
• 📱 The manufacturer “added” unnecessary services: many brands (especially Xiaomi, Oppo) add their own applications to the system that run in the background.

What to do if the RAM is really overloaded?

☑️ Optimizing RAM on Android

Check the list of running applications in the task managerDisable startup of unnecessary appsUpdate the firmware and applications to the latest versionsTry alternative firmware (for example, LineageOS)Reset the settings to factory settings (if the brakes are critical)

Done: 0 / 5

Let's look at each item in more detail:

1. Autostart applications: many apps (for example, AliExpress or Wildberries) start when you turn on the phone and hang in the background. Disable them in the settings: Settings → Applications → [Select application] → Autostart.
2. Limit background processes: in Settings → For developers (how to enable - see below) there is an option Limit background processes. Set the value Maximum 2-3 processes.
3. Light versions of applications: replace “heavy” applications with lightweight ones (for example, Facebook Lite, Messenger Lite, YouTube Go).
4. Resetting the cache: sometimes the application cache swells to gigantic proportions. To clear it, go to Settings → Storage → Cached data.

If the problem is not solved, the firmware may be to blame. For example, on some devices Samsung there was a leak. memory that was corrected only by updating to One UI 5.0 there was a memory leak that could only be fixed by updating to One UI 5.1.

⚠️ Attention: Do not use tasks like killall or manually ending system processes through ADB. This can lead to unstable operation of the phone or even a “brick” (firmware failure).

Myths about RAM on Android that you shouldn't believe

There are many myths around RAM that prevent users from using their devices correctly. Let's look at the most popular ones:

• 🧹 “You need to constantly clean your RAM”: as we have already said, empty RAM is ineffective. Android itself optimizes its use.
• ⚡ "The more RAM, the faster the smartphone": operating speed depends on the processor, software optimization and memory type (for example, LPDDR5 faster LPDDR4X).
• 🔄 "Closing applications from multitasking saves battery": on the contrary, restarting costs more energy than keeping the application in the background.
• 📱 "Chinese smartphones with 12 GB of RAM are better than flagships with 8 GB": manufacturers often add extra memory to hide poor firmware optimization.
• 🛠️ "Memory optimizers speed up the phone": most of these applications simply close background processes, which leads to the opposite effect (applications take longer to open).

Another common stereotype: “If there are many processes hanging in the task manager, this is bad.”In fact, Android keeps frequently used applications in memory to make them faster. For example, if you regularly use Telegram, the system leaves it in RAM even after closing.

An interesting fact: in older versions of Android (before 7.0) there really were problems with memory management, and optimizers could help. But starting. since Android 8.0 Oreo, the system has become much smarter in allocating resources.

What to do if the RAM is constantly full (practical guide)

If you notice that your smartphone has begun to slow down, applications often reload, and the task manager constantly shows 90%+ RAM load - follow this algorithm:

1. Step 1: Diagnostics
   • Check which applications are consuming the most memory (see section "How to check RAM usage")
   • Start the phone in Safe Mode (press the power button → "Safe" mode") If the problem disappears in it, third-party software is to blame.
2. Step 2: Software optimization
   • Disable autorun of unnecessary applications (see instructions above).
   • Update all apps and firmware to latest version.
   • Remove or replace “gluttonous” applications with a light version (for example, Facebook → Facebook Lite).

Step 3: Radical measures

• Reset the settings to factory settings (Settings → System → Reset settings).
• Install custom firmware (for example, LineageOS or Pixel Experience), if the official one does not work well.
• Take the phone to the service - there may be a problem in the hardware (for example, a faulty RAM chip).

If you decide to reset your settings, do not forget to backup your important data. To do this, you can use:

• 🔄 Built-in backup function (Settings → Google → Backup).
• 💾 Third-party utilities, for example, Swift Backup (requires root) or Titanium Backup.

⚠️ Attention: Installing custom firmware can lead to loss of warranty and unstable operation of the device. Before installing the firmware, check the compatibility of the model on the forums (for example, 4PDA or XDA-Developers).

FAQ: Frequently asked questions about RAM on Android

❓ After closing the game, why does it open again from the beginning and not from the save?

This happens because Android closed the game process to free up RAM for other tasks. To avoid. this:

• Close background applications before starting the game.
• Enable performance mode in the settings (if available).
• Use utilities like Game Booster (but they do not always help).

On some devices (for example ASUS ROG Phone) have a special mode X Modethat blocks the game from closing.

❓ Is it possible to increase the amount of RAM on Android?

Physically, no, since the memory is soldered to the motherboard. However, there are workarounds. paths:

• Using a swap file (swap): some custom kernels (for example, KernelSU) allow you to create a swapfile on the internal memory, but this greatly wears out the drive.
• RAM disk in the terminal: through Termux you can emulate additional memory, but this is a temporary solution and works only for specific tasks.
• Cloud services: some games (for example, xCloud or GeForce NOW) are launched on remote servers where RAM is not limited.

In practice, these methods are ineffective. It is better to buy a smartphone with sufficient memory initially.

❓ Why is there enough RAM on an iPhone, but not on an Android with 12 GB?

This is due to several factors:

• OS optimization: iOS is developed exclusively for hardware Apple, while Android must work on thousands of different devices.
• Background processes: Android allows applications to run in the background longer, than iOS.
• Manufacturers: many brands (especially Chinese) add unnecessary services to the firmware that load RAM.
• Multitasking: on Android it is easier to work with several applications at the same time (for example, pip mode for YouTube), which requires more memory.

However, this does not mean that iOS is better. For example, on Android you can install light versions of applications or custom firmware, while on iPhone there are no such options.

❓ How to enable developer mode to configure RAM?

To access hidden settings:

1. Go in Settings → About phone.
2. Find item Build number (or Version MIUI on Xiaomi).
3. Tap on it 7 times in a row. A notification “You have become a developer!” will appear.
4. Return to the main settings menu - a new section will appear there For developers.

In this section you will find options:

• Limit background processes (reduces the load on RAM).
• Do not save actions (disables animations, speeding up work).
• Enable 4x MSAA (improves graphics in games, but increases consumption memory).

❓ Is it true that LPDDR5 RAM is better than LPDDR4X?

Yes, LPDDR5 has several advantages:

• Higher throughput: up to 6400 Mbps vs. 4266 Mbps with LPDDR4X.
• Lower power consumption: more efficient power management.
• Larger volume: supports up to 16 GB per chip (vs. 12 GB y LPDDR4X).

However, in practice the difference is noticeable only in resource-intensive tasks (for example, editing 4K video or games with high settings). For everyday tasks (social networks, instant messengers) LPDDR4X it is quite enough.