answer:50C is roughly 122F. That’s a tad warm for a Clarkdale i3 (mine idles around 43C/110F), but ice-cold for an old Northwood Pentium 4 (my old P4 idled around 57C/135F). Phenom II’s tend to run in-between; a little warm, but are generally fine until you hit the mid/high-60s. So you’re okay, but I’d still give your system a little blast of air or something every once in a while to knock out the dust bunnies. FWIW, my video card reaches ~88C/190F under load.