@sharps_eng: yes, you are right about the thermal challenges in the stack and this will have some limitations on the logic die. The hybrid memory cube site claims the memory cube will consume 70% less energy per bit than DDR3 DRAM memories but will deliver 15x the performance. This remains to be seen.
Aren't these things going to get pretty hot with certain patterns of usage and data?
For instance if the access pattern does not allow the stacked devices time to cool off between bursts? The internal layers are short on cooling opportunities that's for sure.
Perhaps they can rely on certain friendly usage patterns, with particular cache controllers and DMA engines in specific architectures etc.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.