Ice Universe informs that Samsung may be having some TDP issues with the latest Exynos 9820 test samples and the core configurations now includes just two Mongoose M4 cores along with two Cortex-A76 and four Cortex-A55 cores from ARM. Also, instead of Samsung's rumored in-house GPUs, the Exynos 9820 would be coupled with ARM's Mali-G76 GPU, at least in the upcoming Galaxy S10.
https://www.notebookcheck.net/Samsung-s-upcoming-Exynos-9820-SoC-gets-leaked-core-configuration.315844.0.html