Redmi Turbo 4: Redefining Sub-Flagship Performance with the Dimensity 8400-Ultra

Redmi Turbo 4: Redefining Sub-Flagship Performance with the Dimensity 8400-UltraOn February 2nd, 2025, Redmi officially launched the Redmi Turbo 4. Kicking off Xiaomi's 2025 product lineup and marking a new beginning for Redmi, the phone's biggest highlight is undoubtedly its incorporation of the new Dimensity 8400-Ultra mobile platform chip

Redmi Turbo 4: Redefining Sub-Flagship Performance with the Dimensity 8400-Ultra

On February 2nd, 2025, Redmi officially launched the Redmi Turbo 4. Kicking off Xiaomi's 2025 product lineup and marking a new beginning for Redmi, the phone's biggest highlight is undoubtedly its incorporation of the new Dimensity 8400-Ultra mobile platform chip. The Redmi Turbo 4 signifies a new era of performance in the sub-flagship smartphone segment.

The Dimensity 8400-Ultra, built on TSMC's 4nm process, is MediaTek's latest masterpiece. Its most significant feature is the introduction of a full-fledged octa-core design for the first time in a sub-flagship platform, utilizing eight A725 cores. This bold design isn't simply about increasing core count; it's about deeply optimizing cache and meticulously refining the architecture to achieve significant performance gains while significantly reducing power consumption. Official data shows a 41% performance increase and a 44% decrease in power consumption compared to its predecessor. These figures demonstrate the Dimensity 8400-Ultra's groundbreaking advancements in performance and energy efficiency, rivaling some flagship models and delivering a truly exceptional experience.

Beyond the powerful CPU, the Dimensity 8400-Ultra boasts a flagship-level G720 GPU, further enhancing graphics processing capabilities. This allows the Redmi Turbo 4 to smoothly run various mainstream mobile games, offering players an unparalleled gaming experience. At Redmi's launch event, ten common application scenarios were showcased including gaming, video recording, Taobao, Douyin, and WeChat voice calls with detailed comparative tests against the previous generation flagship 8G3 platform. Results showed the Redmi Turbo 4 performing on par with, and even surpassing in some aspects, the flagship platform, highlighting the Dimensity 8400-Ultra's power and Redmi's expertise in performance tuning.

The Dimensity 8400-Ultra's exceptional performance stems from its all-core architecture, enhanced cache, and advanced manufacturing process. This technological synergy elevates sub-flagship performance and energy efficiency to new heights, providing users with an unprecedentedly smooth experience.

To visually demonstrate the Dimensity 8400-Ultra's real-world performance on the Redmi Turbo 4, we conducted gaming tests. First, we chose Genshin Impact, one of today's most popular games. With graphics set to maximum and frame rate locked at 60fps, we performed a 20-minute run-and-fight test in Sumeru City, engaging performance mode and using Perfdog for data logging.

The Redmi Turbo 4 achieved an average frame rate of 59.6fps with a frame stability index of 0.9 over the 20-minute test. This indicates the game ran consistently at 60fps, with occasional, almost imperceptible, minor frame rate fluctuations. Average power consumption was only 5.6W, demonstrating excellent power control while maintaining high frame rates.

In the Genshin Impact test, the Redmi Turbo 4 demonstrated powerful gaming performance, easily handling high-resolution, high-frame-rate demands with smoothness and stability comparable to flagship models.

Next, we tested another demanding game, Reverse: Water Margin (Ni Shui Han) mobile. Again using high graphics and 60fps settings, we performed a run-through test in the new "Jiuguang Hanlin" map. Reverse: Water Margin places extremely high demands on phone performance, featuring complex scenes and detailed visuals, significantly challenging the phone's graphics processing capabilities.

The results were equally impressive. The Redmi Turbo 4 achieved an average frame rate of 59.3fps in Reverse: Water Margin, exceeding expectations in frame rate stability. Notably, power consumption in the Reverse: Water Margin test was slightly lower than in Genshin Impact, under 5W.

These gaming tests demonstrate the Redmi Turbo 4's Dimensity 8400-Ultra's distinct advantage in gaming performance. Although positioned as a sub-flagship chip, its real-world frame rates reach flagship-level "full-frame" performance, even surpassing some previous-generation flagship models in power efficiency.

Beyond the powerful Dimensity 8400-Ultra chip, the Redmi Turbo 4 features the same 3D ice-sealed circulating pump cooling system found in flagship phones. This system boasts a large 5000mm area with a concave-convex design, effectively increasing cooling efficiency and ensuring stable temperatures even during prolonged high-performance application use. Furthermore, Redmi and MediaTek engineers collaborated on in-depth tuning, further optimizing chip performance to achieve optimal results on the Redmi Turbo 4.

The Redmi Turbo 4's excellence extends beyond gaming. In daily applications, it showcases powerful performance and smoothness, effortlessly handling multitasking and large applications, providing a silky-smooth user experience.

The Redmi Turbo 4 redefines the sub-flagship market. It breaks through traditional performance bottlenecks, bringing flagship-level performance and a smooth experience to a wider user base.

A year ago, MediaTek launched the Dimensity 9000 flagship chip, ushering in a new era of all-core computing for mobile chips. Now, the Dimensity 8400-Ultra further solidifies this technological path, extending its advantages to the mid-to-high-end smartphone market. With its all-core architecture, exceptional performance, and superior energy efficiency, the Dimensity 8400-Ultra injects new vitality into the mid-to-high-end segment.

The Redmi Turbo 4, powered by the Dimensity 8400-Ultra, is poised to lead the sub-flagship gaming experience in 2025, becoming a top choice for users seeking high performance and value. Its outstanding performance, energy efficiency, and cooling capabilities distinguish it in its price range, setting a new benchmark. The Redmi Turbo 4 is more than just a phone; it represents the future direction of sub-flagship smartphone performance.