I know that IVY had some issues temp wise and some people de lid there CPU and re applied thermal. Honestly, what I would do is purchase stronger fans possibly something like noctua NF-12's. They are kind of expensive but probably the best you can buy really. Also what does the rest of your case's cooling situation look like I remember the Corsair 600T (your case) I had it for a day and the thermal situation was pretty awful.
Also, you may want to re apply your TIM. If you don't have some perhaps purchase some. I know linus uses IC Diamond. Which isn't cheap either. I have but didn't pay 30 dollars for it like NCIX is requesting. Also remember only a pea size amount you don't want to over due it.
ic diamond 24 qt
ic diamond 7 qt