Intel Motherboards : X99 Taichi Xeon Tjmax

In that case I am not sure, you could try contact Tech Support directly and ask.

http://event.asrock.com/tsd.asp

I have heard the term and seen it about but until now have never really looked into it. My quick google search clearly failed me 

I do know that typically TJmax used to only be a fixed value on mobile CPUs (socket 2011 too?), either way I have not encountered any issues regarding it before. Please let us know if you get an explanation, I am sure there will be others wanting to know. Based on your info under reading temps could prove troublesome, even if it is only by +/- 5c.