Most reviewers are not looking at tdie temp. This is the temp that the CPU throttles at when hits the AMD "magical" 68 degrees. You can basically ignore anything if it doesn't specifically reference tdie temp. The only programs that report tdie correctly are ryzen master and hwinfo64.
source: http://www.amd.com/en/products/cpu/amd-ryzen-threadripper-1950x under specifications it lists 68 degrees, which if you research more is a tdie temp.