i am not (anymore) a professional when it gets to hardware setup and performance, but usually there are more things in play than bare hardware specs.
so maybe it would help to investigate, if you guys could share logfiles, performance data etc., as for example shown here: How to Make a Performance Capture
also, do you want to report this a an issue? should i change category to bug reports or feedback?
on another note, 90°C for a CPU is not necessarily bad. i do not have the exact specs of that CPU right now, but usually 90°C are still within parameters for most modern CPUs.