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The REDMAGIC 11 Pro is the best choice if you specifically want active cooling built into the phone. Its internal fan works with a liquid-cooling loop and a very large vapor chamber, giving it more thermal headroom than a conventional gaming handset during long sessions. It also combines a 144 Hz display, shoulder buttons, a 7,500 mAh battery and an 80 W charger.

The ASUS ROG Phone 9 Pro is the strongest alternative for buyers who prefer ASUS’s gaming software and accessory ecosystem, but its active fan is a separate AeroActive Cooler X Pro attachment. Samsung’s Galaxy S26 Ultra is a useful mainstream comparison: its enlarged vapor chamber stayed cool during a one-hour Genshin Impact test, yet it has no internal fan and is therefore a passive-cooling phone.

Quick comparison

Phone Cooling design Gaming hardware Battery and charging Main trade-off
REDMAGIC 11 Pro Built-in fan, liquid channels with a piezoelectric ceramic micropump and vapor chamber Snapdragon 8 Elite Gen 5, 144 Hz display, shoulder buttons 7,500 mAh; bundled 80 W charger Audible fan, air-intake and dust-resistance limitations; weaker camera versatility and shorter Android-update commitment
ASUS ROG Phone 9 Pro External AeroActive Cooler X Pro fan; the phone itself is not an internally fan-cooled design Gaming-focused software and controls; Tom’s Guide recommends it for pure gaming ability Not stated in the cited testing Extra purchase, bulk and setup time for active cooling
Samsung Galaxy S26 Ultra Passive enlarged vapor chamber; no internal fan Mainstream flagship platform; stayed cool in a one-hour Genshin Impact test Not stated in the cited testing Less specialized thermal extraction during very long, high-load sessions

These phones answer different questions. Choose the REDMAGIC 11 Pro for the simplest built-in-fan solution, the ROG Phone 9 Pro if ASUS’s software and detachable cooler appeal to you, and the Galaxy S26 Ultra if you want a mainstream daily phone that can remain cool without a fan.

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What “active cooling” means on a phone

Every modern performance phone uses some form of passive heat spreading. A vapor chamber moves heat away from the processor into a larger surface area, where it can dissipate through the frame. It does not actively pull heat out of the device; it only spreads it.

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Active cooling adds a powered component. An internal fan moves air through a dedicated intake and exhaust path. A clip-on cooler places a fan against the phone’s exterior. The goal is to delay the point at which the processor reduces clock speeds to control temperature. That matters most after 30 to 60 minutes, when a short benchmark result no longer represents the frame rates you actually experience.

Active cooling is not a guarantee of a fixed frame rate. Game-engine limits, software optimization, network latency and the graphics settings you choose still matter. It does, however, give the phone another way to shed heat instead of relying only on its chassis and vapor chamber.

REDMAGIC 11 Pro: the best integrated cooling design

How its cooling system works

PhoneArena describes the REDMAGIC 11 Pro as the first smartphone with a functional liquid-cooling system. Its design combines a built-in fan with the company’s largest vapor chamber, while Android Central reports a piezoelectric ceramic micropump that circulates coolant through ultra-fine liquid channels. In practical terms, heat is spread through the liquid loop and vapor chamber, then moved toward the fan-assisted airflow path.

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That architecture is different from a phone that merely has a large vapor chamber. The REDMAGIC has an active heat-removal stage inside the handset, so it does not depend entirely on passive dissipation once a demanding game has been running for a long period.

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Measured performance

Android Central’s 2026 testing recorded the following results:

Test Result What it indicates
Geekbench 6 single-core 3,614 Short burst CPU performance
Geekbench 6 multi-core 10,785 Short burst performance with several CPU cores loaded
3DMark Wild Life Extreme 7,105; 42.55 FPS Graphics performance in a demanding synthetic workload
3DMark Solar Bay 13,449; 51.14 FPS Ray-tracing-oriented graphics workload

Android Central reported little throttling during extended gaming, although the phone became warm. “Little throttling” should not be read as “never gets hot”: the cooling system preserves more performance, but it still has to move heat somewhere, and the exterior can warm up while doing so.

Gaming controls and display

The 144 Hz display gives compatible games more frequent screen updates than a 60 Hz panel. Higher refresh does not automatically create 144 frames per second; the game, chipset and graphics settings must be able to supply those frames. It can nevertheless make scrolling, camera movement and touch feedback appear smoother when performance is high enough.

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Built-in shoulder buttons provide physical or capacitive control points that can be mapped to in-game actions. They are useful in shooters, racing games and other titles where moving a thumb away from the screen would cost time. Their value depends on whether your games support the mappings you want and whether you are comfortable holding a wider gaming-oriented chassis.

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Battery life and charging

The 7,500 mAh battery is unusually large for a gaming phone. Android Central reports about a day and a half with extended gaming and up to two days with medium use. Those are reviewer observations, not a guaranteed runtime: brightness, cellular reception, refresh rate, game frame-rate limits and fan use all change endurance.

The phone includes an 80 W charger, according to Android Central and REDMAGIC’s 2026 product information. A bundled charger means you do not have to budget for a separate high-wattage brick to reach the advertised charging capability. Charging speed can still vary with temperature, battery level and regional power standards.

The costs of the built-in fan

  • Noise: a small fan can be audible, especially at its higher setting. That is the trade for moving air through the phone instead of relying on passive heat spreading.
  • Airflow requirements: the intake and exhaust need to remain unobstructed. A tight case, blanket or hand position over the intake can reduce the cooling benefit.
  • Dust exposure: Tom’s Guide flags dust-resistance limitations. Treat the fan opening as a reason to avoid dusty environments and to keep debris away from the intake.
  • Camera compromise: Android Central describes the camera versatility as mediocre compared with mainstream flagships. The phone prioritizes gaming hardware over a broad camera system.
  • Software support: Android Central reports two Android updates and five years of security updates. That is relevant if you keep phones for many years or want the longest possible feature-update runway.

ASUS ROG Phone 9 Pro: best when you want an accessory ecosystem

How the AeroActive Cooler changes the proposition

Tom’s Guide recommends the ROG Phone 9 Pro for pure gaming ability when it is paired with the AeroActive Cooler X Pro. The cooler is an external fan that attaches to the phone, so active cooling is accessory-dependent rather than integrated into the handset.

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This approach has an obvious advantage: the cooler can be replaced or left at home when you want a slimmer phone. It also has disadvantages. You must buy, carry and attach the accessory, and the combined phone-and-cooler package is bulkier than a phone with all cooling hardware inside.

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Who should choose it

The ROG Phone 9 Pro makes the most sense for someone who values ASUS’s gaming software, control features and accessory ecosystem enough to accept the extra hardware. Tom’s Guide’s recommendation is for the phone’s gaming ability with the cooler attached; it should not be interpreted as evidence that the uncooled handset offers the same active-thermal behavior.

The cited material does not establish a battery capacity, charging figure, accessory price or regional availability for this comparison. Check the package contents and local listings before assuming the AeroActive Cooler is included.

Samsung Galaxy S26 Ultra: a passive-cooling benchmark

The Galaxy S26 Ultra shows why “stays cool” and “has active cooling” are not interchangeable claims. Tom’s Guide reports that its enlarged vapor chamber kept the phone cool during an hour of Genshin Impact testing. That is strong evidence of effective passive thermal management in that test, but the phone has no internal fan.

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For a buyer who wants one mainstream flagship for gaming, photography, communication and general daily use, passive cooling may be preferable. There is no fan noise, no intake to keep clear and no accessory to attach. The trade-off appears during sustained workloads: the phone has no powered airflow stage to add thermal extraction after the vapor chamber has spread the heat.

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Cooling comparison by the factors that matter

Decision factor REDMAGIC 11 Pro ROG Phone 9 Pro with AeroActive Cooler X Pro Galaxy S26 Ultra
Active cooling location Inside the phone External attachment None; passive vapor chamber
Long-session thermal headroom Designed for sustained loads; Android Central observed little throttling Improved when the external cooler is attached Tom’s Guide observed cool operation for one hour of Genshin Impact
Fan noise Possible during operation Comes from the attached cooler None from a phone fan
Portability No separate cooler to carry Cooler adds bulk and must be transported Phone-only setup
Controls Shoulder buttons Gaming controls and ASUS software ecosystem Not positioned as a dedicated gaming-control phone in the cited material
Display refresh 144 Hz Not stated in the cited material Not stated in the cited material
Battery figure 7,500 mAh Not stated Not stated
Charging figure 80 W charger bundled Not stated Not stated
Camera and software emphasis Gaming hardware prioritized; two Android updates and five years of security updates reported Gaming software and accessories emphasized Mainstream flagship positioning

Do you need a phone with a built-in fan?

Choose integrated active cooling when sustained FPS is the priority

A built-in fan is most valuable if you regularly play demanding 3D games for sessions long enough for heat to accumulate. It also suits players who do not want to remember a separate cooler, cable or mounting step. The REDMAGIC 11 Pro is the clearest fit because the fan, liquid loop and vapor chamber are designed as one system.

Choose an external cooler when flexibility matters more

An external cooler is sensible when you want gaming accessories and software controls but do not want a fan inside the phone all the time. The ROG Phone 9 Pro gives you that option, with the understanding that the active-cooling experience depends on buying and attaching the AeroActive Cooler X Pro.

Choose passive cooling when silence and everyday balance matter

If most of your play sessions are shorter or you place a higher value on a conventional flagship experience, a large vapor chamber may be sufficient. The Galaxy S26 Ultra’s one-hour Genshin result demonstrates that a passive phone can remain cool in a demanding test without an internal fan.

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How to get the most from active cooling

  1. Keep the airflow path open. Do not cover the REDMAGIC’s intake with a case edge, bedding or your palm. For an external cooler, attach it exactly as designed so its contact surface sits flat.
  2. Use a stable power source. The REDMAGIC includes an 80 W charger, but charging and gaming together can raise heat. If the phone becomes noticeably warmer while charging, reduce game settings or pause charging during the most demanding section.
  3. Set a realistic frame-rate target. A 144 Hz screen is useful only when the game can sustain a high frame rate. A stable lower target often feels better than an unstable maximum setting that repeatedly triggers thermal or power limits.
  4. Listen for the fan and watch the surface temperature. More fan speed can improve heat removal but also increases noise. If the handset becomes uncomfortable, lower graphics quality, frame rate or brightness instead of treating the fan as permission to ignore heat.
  5. Keep dust away from the intake. The REDMAGIC’s fan needs air, while Tom’s Guide notes dust-resistance limitations. Avoid dusty storage and inspect the opening if airflow seems weaker or the fan sounds abnormal.
  6. Test your own games. Synthetic scores such as Geekbench and 3DMark are useful reference points, but your game’s engine, resolution and network workload determine the experience you actually get. Compare frame-rate stability after at least 30 minutes rather than judging only the first few minutes.

Buying checklist

  • Do you require a fan inside the phone, or is a clip-on cooler acceptable?
  • Will you play long enough for sustained thermal performance to matter?
  • Can you tolerate fan noise during play?
  • Is the intake protected adequately for where you use the phone?
  • Do you need shoulder buttons or other dedicated controls?
  • Is a 7,500 mAh battery and bundled 80 W charger more important than camera versatility?
  • Are two Android updates and five years of security updates sufficient for your ownership period?
  • Would an external cooler’s cost and bulk undermine the convenience you want?
  • Do you need a mainstream camera and daily-driver experience instead of gaming-first hardware?
  • Is the model officially available in your region, and are the charger and cooler included in the local package?

Verdict

The REDMAGIC 11 Pro is the best phone here for buyers who specifically ask for active cooling built into the handset. Its fan-and-liquid architecture, 144 Hz display, shoulder buttons, 7,500 mAh battery and 80 W charger are purpose-built for long mobile-gaming sessions, and Android Central observed little throttling in extended play. Accept the audible fan, airflow and dust considerations, less versatile cameras and limited Android-update promise.

Pick the ROG Phone 9 Pro if ASUS’s gaming software and accessory ecosystem matter more than having cooling integrated into the phone. Pick the Galaxy S26 Ultra if you want a quieter, mainstream flagship that demonstrated effective passive cooling and you do not need a built-in fan.

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