The rather affordable Xiaomi Mi 4s is powered by the upper mid-range Snapdragon 808 chip, which packs a six-core processor, Adreno 418 GPU and 3 GB of RAM. That's the same SoC to power the Xiaomi Mi 4c and the LG G4.
The processor of the S808 chip has two powerful Cortex-A57 cores ticking at 1.82GHz, and four energy-efficient Cortex-A53 blocks running at 1.44GHz. A single of those Cortex-A57 cores is quite a beast and it easily outruns any Cortex-A53 CPU (K4 Note, Honor 5X), but scores behind the Cortex-A72 within the Snapdragon edition of the Redmi Note 3.
Higher is better
Then there is the multi-core GeekBench 3, where core count matters and the Mi 4s falls behind some of the popular eight-core smartphones, but its score is still respectable.
Higher is better
The compound AnTuTu test puts the Mi 4s better than the Helio X10-powered Redmi Note 3, equally capable as the HTC One A9, but behind the Snapdragon model of the Redmi Note 3. The Snapdragon 650 with the Redmi Note 3 also offers a hexa-core processor, but instead of 2x Cortex-A57, it has 2x Cortex-A72, which matters a lot.
Higher is better
The BaseMark OS II 2.0 test, which gauges CPU, GPU, Memory, System, and Web performance, puts the Xiaomi Mi 4s on top of every other smartphone in its price bracket. The Nexus 5X (also S808 chip) came up with a notch better result, probably because of Android Marshmallow optimizations.
Higher is better
We already know the Adreno 418 is perfectly capable of handling itself under load quite well when it comes to a 1080p display and the benchmark results confirm this.
Higher is better
Higher is better
BaseMark X, a demanding GPU bench, says the Adreno 418 within the Mi 4s is better than the Adreno 405 (One A9), Mali-T720MP3 (K4 Note), and the PowerVR G6200 (Redmi Note 3 Helio X10). The Adreno 510 within the Redmi Note 3 with Snapdragon 650 came out more capable, though.
Higher is better
The dual glass design of the Xiaomi Mi 4s might be beautiful, but it takes its toll on heat management. The Mi 4s becomes warm rather quickly (though, not hot) and we noticed the throttling kicking in on some benchmarks.
You can see this perfectly on the lengthy BaseMark ES 3.1, which took about 40 minutes to complete. The Mi 4s should out a similar result to Mi 4c and Nexus 5X, as both have the same GPU, but it didn't.
The throttling isn't detectable in real life, even when playing games, so you shouldn't have any worries. The phone doesn't get particularly hot either but it's something you should keep in mind.
Higher is better
The Xiaomi Mi 4s offers more than adequate performance and will handle anything you can run or play. It has the same hardware as the LG G4, and the 3GB RAM will be enough for heavy multi-tasking. There is the issue with throttling, but nobody will notice it in real-life use.
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