Overclocker der8auer got his hands on AMD's new Ryzen Threadripper 1950x processor and decided to take a look under the hood. He delidded his processor and posted some nice photos that show the delidding process and what's under the integrated heatspreader (IHS).
Under the IHS are four dies, just like the EPYC server processors. Just two of these are activated on the consumer parts. Unfortunately, der8auer broke the CPU during the delidding process, but at least he managed to snap some good video footage and some pictures.
UPDATE: AMD asked der8auer to (temporarily) take the video offline. Which is of course pointless as by now every major tech site has already covered the news.