Samsung-powered version of Apple A9 is too hot to handle
Ever since Apple’s iPhone 6s and 6s Plus launched, we’ve seen reports from users who were suffering lower-than-expected battery life or found that the home button became too hot to touch in certain situations. Some of these issues are expected with any new device launch, particularly given that Apple chose to source its A9 SoC from two different vendors — Samsung and TSMC. Samsung had been shipping 14nm hardware longer than TSMC and has already been confirmed as having a smaller die size,
One thing we want to note off the bat is that this doesn’t seem to be a performance problem. One article tries to argue that deviations in AnTuTu scores are signs that the Samsung devices aren’t as fast as the TSMC hardware, but the largest displayed gap between the two on any given run was just 2%. We don’t trust or recommend AnTuTu as a benchmark, but there’s still no sign that Samsung is losing performance to TSMC.
Over the course of an hour of video, the Samsung-equipped iPhone went from 59% to 42% (a drop of 17%) while the TSMC device went from 74% to 57% — a drop of 17%. Video playback is going to be handled by fixed function blocks within the GPU, which means whatever power consumption issues are being seen are specific to CPU-heavy workloads. The question is, how much does this matter to real-world use cases?
08 Oct, 2015