MediaTek entered the news yesterday with rumors of the Helio X20 chipset suffering from overheating issues, Snapdragon 810 anyone?. The rumors claimed that industry heavyweights Xiaomi, Lenovo and HTC are backing out because of the SoC’s thermal behavior and weren’t using it for future smartphones.
The Chinese chipmaker was quick to respond, and has now insisted on Weibo that the Helio X20 is in mass production, no heating issues are observed, and it’s business as usual with its partners. And while that was to be expected, the truly interesting bit is how the chip actually handles the high temperatures.
Apparently, when the pair of Cortex-A72 cores inside the CPU reach a certain threshold, they are shut down and the processor turns into an octa-core Cortex-A53 affair. MediaTek has been using the True octa-core concept in previous designs, meaning that all cores can run at the same time, as opposed the big.LITTLE architecture, where two separate clusters handle tasks depending on performance requirements.
So in effect, the 10-core CPU is such for a limited amount of time and then turns into your regular octa-core Cortex-A53 familiar from current designs, like the Helio X10. It will be interesting how that translates into repeated benchmark runs and, more importantly, continuous real-world use.