Intel Core i9-9900K 8 Core and 16 Thread 5.0 GHz CPU Review Ft. Z390 AORUS Master Motherboard
AORUS Z390 MasterOctober, 2018
Intel Core i9-9900K - Cooler Performance and Temperatures
The Intel Coffee Lake processors feature higher clock speeds and more cores, this means that the temperatures can directly be affected by the updated design. In terms of packaging, the processor's ship with STIM or Soldered Thermal Interface Material.
In short, Intel has gone back to the soldered design with higher quality thermal interface material between the die and IHS so that should technically lead to better temperatures under overclocking and stress situations. The results were carried out with the Corsair H115i PRO liquid cooler: