The HoloLens’ HPU is a custom 28nm coprocessor designed by TSMC
The chip packs 24 Tensilica digital
signal processor (DSP) cores. As opposed to more general-purpose CPU
cores, DSPs are a specialized technology designed for rapidly processing
data flowing in from the world—a no doubt invaluable asset while
rendering augmented reality environments in real time. Microsoft’s HPU
also contains roughly 65 million logic gates, 8MB of SDRAM, and 1GB of
traditional DDR3 RAM. It draws less than 10W of power, and features PCIe
and standard serial interfaces.
The HPU's dedicated hardware is up to
200 times faster than performing the same calculations via software on
the less-specialized 14nm Intel Cherry Trail CPU. The HPU can
perform roughly 1 trillion calculations per second, and the data it
passes to the CPU requires little additional processing.
Read more and see a video demo here:http://www.pcworld.com/article/3110976/virtual-reality/hololens-secrets-revealed-microsoft-details-its-24-core-holographic-processor.html
Presentation slides here:http://www.theregister.co.uk/2016/08/22/microsoft_hololens_hpu/