To get a feel for how graphics performance on the Nexus 5X compares to other devices, we used GFXBench, which has been one of our standard graphics performance benchmarks for a while. In order to ensure Vsynch and resolution isn’t a limiting factor, we compare offscreen test results. We also used Futuremark's 3DMark Ice Storm Unlimited benchmark.
The Nexus 5X lands about in the middle of the pack here, which is what we'd expect from its mainstream Snapdragon 808 SoC. Graphics performance is somewhat better than last year's flagships, but can't quite catch current-gen, high-end phones.
It's a similar story here. The results are right in line with those put out by last year's flagship phones.