No problem, glad to help. Well, high/low temps are kind of relative. For some components 50 would be high and for some even 70 would not be that problematic. Anyways it's always best to keep system/components as cool as possible.
One more factor is how often and how long the system is under full or heavy load which results in system getting hot. If it's constantly under load and hot you really have to do something to lower temps. If it's not that often and long maybe that fan mod would be enough.
I think the issue here is the heat from the GPU and CPU cooler and not sufficient ventilation inside the case, maybe creating a kind of a hot pocket around the mobo VRM and RAM area.
Temp changes due changing the CPU inside the same case...