Snapdragon 778G+ vs Dimensity 7400X: Which Fits Your Phone?

The Snapdragon 778G+ and Dimensity 7400X are two mid-range chipsets that power very different kinds of phones. The 778G+ is a proven 5G SoC from 2021, while the Dimensity 7400X is a newer, more power-efficient design aimed at 5G and AI tasks. If you prioritize sustained gaming performance and mature software support, the Snapdragon 778G+ is the safer choice; if you want better battery life, newer connectivity features, and a more future-proof AI engine, the Dimensity 7400X fits better.

Background: Where These Chips Come From

The Snapdragon 778G+ was announced by Qualcomm in late 2021 as a mid-range upgrade to the popular 778G. It uses an octa-core CPU (1x Cortex-A78 at 2.5 GHz, 3x A78 at 2.4 GHz, 4x A55 at 1.9 GHz) and an Adreno 642L GPU. It was widely used in phones like the Motorola Edge 30 and Xiaomi 11 Lite 5G NE.

The Dimensity 7400X is a newer chip from MediaTek, released in 2024. It is built on a more advanced 4nm process (vs. 6nm for the 778G+), which gives it a significant efficiency advantage. Its CPU is also octa-core (4x Cortex-A78 at 2.6 GHz, 4x A55 at 2.0 GHz), but the GPU is a Mali-G615 MC2. The “X” suffix is typically used for specific OEM configurations, but the core specs remain the same as the standard 7400.

Technical Specifications at a Glance

• Manufacturing process: 778G+ is 6nm; 7400X is 4nm (more efficient).
• CPU: Both have 8 cores, but the 7400X has a slightly higher clock speed (2.6 GHz vs 2.5 GHz).
• GPU: Adreno 642L vs Mali-G615 MC2. Adreno has a better track record for driver updates and sustained performance.
• Memory support: 778G+ supports LPDDR5 (up to 16GB) and UFS 3.1; 7400X supports LPDDR5 and UFS 3.1 (some variants support LPDDR4X).
• 5G modem: Both are 5G, but the 7400X has a newer modem with better power efficiency and support for 3GPP Release 16.
• AI acceleration: 7400X has a newer APU (AI processing unit) that supports more on-device AI tasks like background blur and object recognition.

Performance: Real-World Benchmarks and Gaming

In synthetic benchmarks like AnTuTu, the Dimensity 7400X typically scores slightly higher (around 600,000) than the 778G+ (around 550,000), mostly due to the faster CPU and newer GPU. However, real-world gaming performance is more nuanced.

The Adreno 642L in the 778G+ has been in many phones for years, so game developers have optimized for it extensively. It also handles sustained loads better because Qualcomm’s GPU drivers are generally more mature. The Mali-G615 is newer, and while it can hit high frame rates in short bursts, it may throttle sooner in long gaming sessions due to thermal limitations.

For example, in a game like Genshin Impact, the 778G+ will hold around 40-45 fps on medium settings, while the 7400X might start at 50 fps but drop to 40 after 15 minutes. For lighter games like PUBG Mobile, both easily hit 60 fps.

Battery Life and Efficiency

This is where the Dimensity 7400X wins clearly. The 4nm process is more power-efficient than the 6nm process, meaning the 7400X draws less power for the same workload. In typical usage (web browsing, video streaming, social media), a phone with the 7400X will last 10-15% longer on a single charge than an equivalent phone with the 778G+.

In gaming, the difference is smaller but still noticeable—the 7400X generates less heat, so the phone doesn’t throttle as quickly. If you’re a heavy user who cares about all-day battery, the 7400X is the better pick.

Connectivity and Features

Both chips support Wi-Fi 6 and Bluetooth 5.2, but the 7400X’s modem is newer and supports 5G carrier aggregation better, which can lead to faster and more stable 5G connections. The 7400X also supports Wi-Fi 6E (if the phone manufacturer implements it), while the 778G+ is limited to Wi-Fi 6.

For camera processing, the 778G+ has a triple ISP that supports up to 200MP photos and 4K HDR video recording. The 7400X also supports 4K video and has a similar ISP, but its AI engine can do real-time bokeh and object tracking more efficiently. In practice, both produce good photos for mid-range phones, but the 778G+ has a slight edge in low-light video due to its more mature image signal processor.

How to Choose: Which Fits Your Phone?

Ask yourself what you value most in a phone. If you are a gamer or someone who keeps a phone for 3+ years, the Snapdragon 778G+ is the safer bet because of its proven driver support and longer software update track record (Qualcomm provides 4 years of security updates for this chip).

If you are a daily user who prioritizes battery life, AI camera features, and the latest connectivity, the Dimensity 7400X is the better choice. It also tends to be cheaper for phone makers to implement, so you might get a better price-to-performance ratio.

Another factor is availability. The 778G+ was used in many popular phones globally, so you have more options. The 7400X is newer and may be limited to specific regions or brands.

Common Problems and Misconceptions

• “The 7400X is faster because it has a higher clock speed.” Clock speed isn’t everything; the 778G+ has a better GPU for sustained gaming.
• “Snapdragon is always better than MediaTek.” That used to be true, but MediaTek’s newer chips are competitive in efficiency and AI.
• “Both chips support 4K 60fps video.” The 778G+ supports 4K 30fps, not 60fps. The 7400X also supports 4K 30fps. Neither can do 4K 60fps.
• “You can’t play heavy games on these chips.” You can, but with settings turned down. They are mid-range, not flagship.

Frequently Asked Questions

Which chip has better AI performance?

The Dimensity 7400X has a newer APU that is better for on-device AI tasks like real-time translation and photo enhancement. The 778G+ has a decent AI engine, but it’s a generation behind.

Can I use both chips in the same phone?

No, a phone is designed around a specific SoC. You cannot swap them. You have to choose a phone that comes with one or the other.

Which chip is better for 5G connectivity?

The Dimensity 7400X has a newer 5G modem that supports more bands and better carrier aggregation, so it is slightly better for future-proofing. The 778G+ is still fine for most current 5G networks.

Is the Snapdragon 778G+ still worth buying in 2025?

Yes, if you can find a phone with it at a good price. It still handles everyday tasks and games well, and it has a long software support window. Just be aware that it’s less efficient than newer chips.

Does the Dimensity 7400X support wireless charging?

Wireless charging is not a feature of the chipset itself; it depends on the phone manufacturer. Both chips can support it if the phone includes the necessary hardware.

Which chip is better for video recording?

The Snapdragon 778G+ has a slightly more mature ISP, so it tends to produce better-looking 4K video with less noise. The 7400X is close, but its video processing is not as refined.

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