When it comes to gaming smartphones, raw performance is only part of the equation. Sustained performance is what separates the champions from the rest—and that means excellent thermal management. In 2025, flagship gaming phones are powered by powerful chipsets and advanced GPUs that push frame rates to their limits, but without proper cooling, they can throttle quickly, leading to lag, dropped frames, and battery drain.
In this article, we dive deep into the world of thermal performance in gaming phones. We compare several of the best gaming smartphones of 2025 to find out which ones truly earn the title of Thermal Titans. We test their cooling systems, thermal throttling, and sustained performance in real-world gaming sessions to help you choose the best device for marathon mobile gaming.
Why Thermal Performance Matters in Gaming Phones
Modern mobile processors are built for speed, but that speed generates heat. Without efficient heat dissipation, a device quickly hits thermal limits and throttles performance to protect itself. The result? Lower frame rates, choppy gameplay, and a compromised gaming experience.
Gaming phones use several strategies to fight heat buildup:
- Vapor chambers to spread heat across a wider area
- Graphene or graphite sheets for improved thermal conductivity
- Active cooling fans to physically blow heat away
- Software-based thermal management to balance performance and temperature
The best thermal solution allows a phone to sustain high frame rates for longer, keeping gameplay smooth and hardware safe.
Testing Methodology
We tested six gaming phones under controlled conditions to measure:
- Surface temperature after 30 and 60 minutes of gaming
- Frame rate consistency over time
- Performance throttling under stress
- Cooling system effectiveness
Games tested include Genshin Impact, Call of Duty Mobile, and PUBG Mobile on max settings. All tests were performed indoors at a stable room temperature of 24°C (75°F). Phones were placed in airplane mode with screen brightness at 80% and no cases or attachments used (unless built-in).
Top Contenders: Gaming Phones Tested
- ASUS ROG Phone 8 Pro
- RedMagic 9 Pro+
- Lenovo Legion Y90
- Black Shark 6 Pro
- OnePlus Ace 3 Pro
- iQOO 12 Pro
1. ASUS ROG Phone 8 Pro
Cooling System: Advanced vapor chamber, graphite layers, and optional AeroActive Cooler X fan accessory
Performance: Snapdragon 8 Gen 3, 16 GB RAM
- 30-minute temperature: 39°C (without fan), 34°C (with fan)
- 60-minute temperature: 45°C (without fan), 39°C (with fan)
- Frame rate drop: Minimal (approx. 5% after 45 minutes)
Why it stands out: With its detachable cooling fan, the ROG Phone 8 Pro manages heat better than any other device. Even without the fan, it offers excellent thermal control. Frame rates remained stable and gameplay was smooth throughout long sessions.
2. RedMagic 9 Pro+
Cooling System: Built-in active cooling fan, 10-layer heat dissipation structure with graphene and vapor chamber
Performance: Snapdragon 8 Gen 3, 16 GB RAM
- 30-minute temperature: 36°C
- 60-minute temperature: 41°C
- Frame rate drop: Barely noticeable (2-3% over time)
Why it stands out: The RedMagic 9 Pro+ is the only phone in our test with an integrated physical fan. This gives it a huge advantage in sustained performance. It stays cool, even under the most demanding loads, and doesn’t require any external accessories.
3. Lenovo Legion Y90
Cooling System: Dual-fan active cooling, vapor chamber, copper thermal pads
Performance: Snapdragon 8+ Gen 2, 18 GB RAM
- 30-minute temperature: 37°C
- 60-minute temperature: 42°C
- Frame rate drop: Moderate (5-8% after 1 hour)
Why it stands out: Lenovo’s dual-fan setup makes the Legion Y90 unique. While it doesn’t get as cold as RedMagic or ROG with external fans, it provides solid performance and excellent ergonomics for gaming. Thermals were consistent, though some throttle occurred in longer sessions.
4. Black Shark 6 Pro
Cooling System: “Sandwich” liquid cooling with vapor chamber, graphene layers, and magnetic cooling accessory option
Performance: Snapdragon 8 Gen 2, 16 GB RAM
- 30-minute temperature: 40°C
- 60-minute temperature: 46°C
- Frame rate drop: 10% drop after 50 minutes
Why it stands out: While Black Shark’s cooling design is impressive on paper, its real-world results show limitations without the magnetic cooler. Thermals spiked during intense combat in Genshin Impact, leading to frame rate dips.
5. OnePlus Ace 3 Pro
Cooling System: Ultra-large vapor chamber (10,000+ mm²), multi-layer graphite structure
Performance: Snapdragon 8 Gen 2, 16 GB RAM
- 30-minute temperature: 38°C
- 60-minute temperature: 44°C
- Frame rate drop: Minor (5-6% after 60 minutes)
Why it stands out: OnePlus Ace 3 Pro doesn’t use active cooling but relies on an enormous vapor chamber and graphite layers to manage heat. It performs admirably for a passively cooled device, though not quite at the level of active fan competitors.
6. iQOO 12 Pro
Cooling System: Full-coverage vapor chamber, thermal gel, graphite sheet
Performance: Snapdragon 8 Gen 3, 16 GB RAM
- 30-minute temperature: 40°C
- 60-minute temperature: 47°C
- Frame rate drop: 12% after prolonged sessions
Why it stands out: iQOO 12 Pro is a performance beast, but its thermal system can’t keep up in extended play. The phone gets warm to the touch and experiences noticeable throttling after 45 minutes, especially in graphically intensive games.
Thermal Benchmark Comparison Chart
| Phone | Cooling Type | Max Temp (°C) | Frame Rate Stability | Throttling |
|---|---|---|---|---|
| ROG Phone 8 Pro | Passive + External Fan | 45 (no fan), 39 (with fan) | Excellent | Minimal |
| RedMagic 9 Pro+ | Built-in Fan | 41 | Excellent | None |
| Lenovo Legion Y90 | Dual-Fan System | 42 | Very Good | Low |
| Black Shark 6 Pro | Passive (optional cooling accessory) | 46 | Fair | Moderate |
| OnePlus Ace 3 Pro | Passive (large vapor chamber) | 44 | Good | Low |
| iQOO 12 Pro | Passive | 47 | Fair | High |
Conclusion: Who Is the Thermal Titan of 2025?
In our real-world tests, two phones stood out as clear Thermal Titans: the ASUS ROG Phone 8 Pro and the RedMagic 9 Pro+.
ROG Phone 8 Pro impressed with its flexibility—the detachable fan accessory gives it an edge in cooling without compromising portability. When used with the AeroActive Cooler X, it delivers unmatched sustained performance.
RedMagic 9 Pro+, on the other hand, wins in convenience. Its built-in fan eliminates the need for accessories and still delivers excellent thermal performance, making it ideal for gamers on the go.
If you prefer a sleek, minimalist phone with strong passive cooling, the OnePlus Ace 3 Pro is a top pick. Meanwhile, budget-conscious buyers looking for high performance might consider the Lenovo Legion Y90 or Black Shark 6 Pro, though they sacrifice some thermal headroom.
For gamers who demand the highest frame rates with minimal heat and zero throttling, thermal performance should be a top consideration—and in 2025, there’s no shortage of serious contenders.
Which gaming phone keeps its cool best for you? Drop your thoughts or personal experience in the comments below!
