I've started folding on my MBP (sig) recently, and I left it going while I was at work yesterday. When I came back, I was greeted by this horrible noise that comes from the right side of my keyboard, like something is messing with the fan. Also, I downloaded a temperature monitoring app (creatively named "Temperature Monitor") that registers my "CPU A Temperature Diode" at 80 degrees Celsius. Should I be concerned? I don't want to ruin my laptop, it still has to get me through college (and I haven't even started yet!).