CECHC have older silicon process so it will run hotter than the slim ones.
if you can run the fan a little faster you can drop it as low as 60c (80-100% fan speed) on both cell and rsx, that as far as I can get when I still own a CECHC console back then, I can still remember that I get around 70-77c on both cell and rsx on CECHC console easily without any custom fan speed.
While both my slim, 25xx with CFW and have its own custom fan curve can go as low as 40c and 43c (cell adn rsx) while my slim 3xxx can go around 60c without any kind of fan mod, but with ez chill fan mod, yeah I drop the temps around 36-40c.