He says 55-60. What is your fan set-up on the dh-14? Do you have 1 fan or is it set up push pull or I think that also supports a 3 fan configuration.
And on Ivy if your temp at load is 55-60 then you have at least 15-20 degrees of room (I would say, Ivy runs a hotter than other models, at least that seems to be the consensus).
He only mentioned his idle temps are 26c-29c. Nothing about his 100% load temps.
I use 2 fans for my D14.