I have a two year old ASUS PC with an i5 quad core. On Speccy it said my system temp was 121c on Speedfan it said the same, but all the cores are well within the ranges they should be. I would think that if my system was running that hot the PC would have shut down. Honestly I don't know what it is saying when it's giving me 'system' temp. Can someone tell me what is going on?