To get a feel for how graphics performance on the new Samsung Galaxy Note5 and S6 Edge+ compare 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, which also performs its tests offscreen to mitigate the effects of screen resolution.
The Galaxy Note5 and S6 Edge+ topped the charts in the T-Rex offscreen test, besting every non-Samsung device by a wide margin. In the fillrate test, however, the Qualcomm SoCs in the previous-gen Galaxy devices, the M9, and Nexus 6 put up higher scores by far.
The Adreno 430 GPU integrated into the SnapDragon 810 SoC powering the HTC One M9 was the only one able to top the Mali-T760MP8 used in the Note5 and S6 Edge+. The overall scores are a bit scattered, due the Exynos 7420's vastly superior CPU/Physics performance, which sways the overall results, but the GPU bound tests--especially GT2--heavily favor the Adreno 430 here.