Ram Jet in Xiaomi: Memory Acceleration Technology You Don’t Notice (But It Works)

Ever wondered why Xiaomi’s new smartphones, with the same processors as its competitors, are so much faster? The secret may lie in the company’s little-known Ram Jet technology, a proprietary RAM optimization solution that isn’t as loudly advertised as HyperOS or Turbo Charging, but its impact on performance is hard to overstate.

In this article, we will take a closer look at what Ram Jet is, how it works in the Xiaomi ecosystem, what models support it, and most importantly, how to use it properly to make your smartphone work at its best. You will be surprised that many users do not even realize that their device has long been using this technology in the background!

And we'll also reveal a few hidden MIUI/HyperOS settings that allow you to manually control Ram Jet, which is especially useful for gamers and those who work with resource-intensive applications. Ready to learn how to squeeze even more performance out of your Xiaomi?

What is Ram Jet and how did it come about in Xiaomi?

The term Ram Jet (literally “reactive memory”) was first introduced by Xiaomi in 2021 as part of a set of optimizations for flagship smartphones. Unlike traditional memory management methods (for example, RAM Boost from competitors), this technology does not just reserve part of the storage for virtual memory, but dynamically redistributes resources depending on the use case.

The idea came from observation: most users use a smartphone to multitask, but not all applications require the same amount of RAM. For example, a messenger can run in the background at minimal cost, while a game or video editor consumes the lion’s share of resources. Ram Jet analyzes these patterns and pumps memory where it is needed most — similar to how a jet engine directs thrust in the right direction.

Interestingly, Xiaomi did not patent this name as a trademark, so in different sources you can find variations: RAM Jet, RamJet or even Jet RAM. However, the essence remains the same – it is a hardware and software complex that works at the core level of MIUI (and now HyperOS) and is closely integrated with Qualcomm Snapdragon and MediaTek Dimensity processors.

How Ram Jet Works: Technical Details

To understand the mechanism of action of Ram Jet, you need to understand three key components:

• 🔄 Dynamic memory allocation: The system monitors RAM load in real time and “borrows” unused resources from background processes, giving them to active applications. For example, if you run a game, Ram Jet can temporarily reduce the memory allocated to Google Play Services or Mi Home.
• 🚀 Pre-boot: By analyzing your habits (for example, if you open Telegram every day at 9 a.m.), the technology pre-reserves memory for these applications, reducing the time they run.
• 🔧 Fragmentation optimization: Unlike standard swaps (virtual memory), Ram Jet minimizes the memory partitioning into small blocks, which reduces the load on the processor when managing resources.

It is important to note that the Ram Jet is not a replacement for traditional virtual memory (which uses part of the internal storage as an addition to RAM), it is an additional layer of optimization that works on top of standard mechanisms. For example, in Xiaomi 13 Pro smartphones with 12 GB of RAM, the technology allows you to efficiently use up to 8-9 GB for active tasks, whereas without it, no more than 6-7 GB would be available.

However, there is a downside: if the smartphone is loaded with “heavy” applications (for example, Genshin Impact + Lightroom + Chrome with a dozen tabs), Ram Jet can begin aggressively “stealing” memory from system processes, which sometimes leads to unexpected reboots of background services (for example, notifications in messengers can come with a delay).

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If you notice that after the update MIUI/HyperOS The smartphone has become "hang" when multitasking, try manually disabling Ram Jet in the engineering menu (instruction below.

What Xiaomi models support Ram Jet

The Ram Jet technology was originally introduced into flagship models, but has since spread to some mid-range devices, as well as the 2026 table below:

Note that even if your model is on the list, the Ram Jet can be disabled by default. For example, in the Redmi K60 Pro, you need to activate it through Settings → About Phone → MIUI version (5 times tap), then go to Developer Settings → Memory Optimization → Ram Jet.

Nor is the technology available in all regional firmware, for example, in the POCO F5 for the European market (EEA), it may not be available, while in the global version (Global) or Chinese (CN) it may be present, due to differences in memory management policies for different markets.

How to turn on or off Ram Jet in Xiaomi

Ram Jet is activated by default on supported models, but in some cases it needs to be manually enabled.

1. Open Settings and go to About Phone.
2. Find the MIUI version (or HyperOS version) and tap it 5-7 times until the “You’ve become a developer” notification appears.
3. Go back to the main settings menu and select a new Developer Settings section (it may be called Developer or Additional).
4. Scroll down to Performance or Memory and find the Ram Jet option (or Dynamic Memory Optimization).
5. Activate the switch. The system may suggest a reboot.

If the option is not in the developer menu, it can mean:

• 📱 Your model does not support Ram Jet (check the table above).
• 🔄 Your firmware is outdated (update to the latest version) MIUI or hyperos).
• 🌍 You have regional firmware without this feature (e.g, EEA Russia).

To turn off the Ram Jet, follow the same steps and deactivate the switch.This can be helpful if you notice:

• ⚠️ Frequent reboots of background applications (for example, music players or instant messengers “fly out” from memory).
• ⚠️ Increased heating with multitasking (technology actively uses the processor to redistribute memory).
• ⚠️ Reduced Autonomy Time (Dynamic Optimization Requires Additional Computational Resources).

Ram Jet vs. Traditional Virtual Memory: Which is Better?

Many users confuse Ram Jet with classic virtual memory (for example, RAM Expansion in Samsung or Memory Fusion in Realme).

The main advantage of Ram Jet is that it does not consume internal storage resources, unlike virtual memory, which can “eat” up to 8 GB of your 128/256 GB. In addition, Xiaomi’s technology is better adapted for gaming scenarios: for example, in Genshin Impact or Call of Duty Mobile, it reduces the number of friezes when loading new locations by 30-40% compared to a traditional swap.

However, the Ram Jet has its disadvantages:

• 🔋 Higher power consumption in multitasking mode (processor constantly analyzes memory allocation).
• 🔄 Manual setup difficulty – there are no flexible options like some custom firmware (e.g. LineageOS).
• 📉 Inefficiency with a small amount of RAM – on devices with 6-8 GB of memory, the benefits are minimal.

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Ram Jet is the optimal solution for flagships with 12+ GB of RAM. On budget models (4-6 GB), traditional virtual memory may be more practical.

How to Optimize Ram Jet for Games and Heavy Apps

If you use a smartphone for gaming or working with graphics editors (for example, Lightroom or Photoshop Express), standard settings of Ram Jet may not be enough.

1. Activate Game Mode: Go to Settings → Special Features → Game Turbo Mode and enable the option Optimize Memory for Games. This will force Ram Jet to reserve up to 50% of RAM for the active application.
2. Add games to the whitelist: In the same game mode, find the Priority Apps section and add Genshin Impact, PUBG Mobile or other resource-intensive games to it, which will prevent them from being uploaded from memory.
3. Turn off background activity of unnecessary apps: In Settings → Applications → Memory Management, limit background work for social networks, instant messengers and other “gluttonous” services. This will free up additional resources for Ram Jet.
4. Use the Engineering Menu to fine-tune: With ##4636##, open the Engineering Menu, go to Testing → Memory Information, and set the Jet RAM Aggressiveness option on High (for power users!).

Important: after changing these settings, restart your smartphone to make the changes take effect, and it is also recommended to check the temperature of the processor using the AIDA64 application - if it exceeds 50 ° C in idle, reduce the level of optimization.

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For maximum gaming performance, combine Ram Jet with GPU Turbo (available in the same game mode settings) to reduce the number of dropped frames by 20 to 30 percent.

Common Ram Jet Problems and Solutions

Despite all the benefits, users sometimes encounter bugs associated with Ram Jet. Here are the most common ones and ways to fix them:

⚠️ Note: If after activation of Ram Jet smartphone began spontaneously restarting, this may indicate a conflict with the custom core or root rights. in this case, disable the function and reset settings through Settings → System system → Resetting settings (select Resetting app settings).

If none of these things worked, try updating your firmware to the latest version. In HyperOS, many Ram Jet bugs that were present in MIUI 13-14 have been fixed. It’s also helpful to check the integrity of system files through Settings → About Phone → System Update → Three Dots (menu) → Package Check.

In extreme cases, you can perform a full reset, but before that, make sure to back up the data through Settings → System → Backup. After reset, Ram Jet will be enabled by default, and you can reconfigure it to your needs.

FAQ: Frequent questions about Ram Jet in Xiaomi