I noticed that my core temps, as reported by SpeedFan and the sound of the loud fans, had increased the other day. Out of curiosity I took the side-panel off my case, and the temps dropped 5-10 degrees fairly quickly. System used to be cooler with the side panel on.
I'm pretty sure that it's an issue with my inflow fan (low on the front panel) not breathing as well as it used to, but I just found the change interesting. Any opinions on case open vs. case closed for long-term builds (as opposed to benching)?