I think 90c is the "pain limit" on many CPU's and GPU's while 95-97 is the "killer limit"
I think my record is only 78 or 80c and I heard Acer's cases have poor ventilation (I just happen to have Acer's case :/ ), my GPU goes up to 88c when playing C3.
If this only happens in C3 then you just have to do something to reduce load until this (if ever) gets adressed
If this happens on any demanding game then you may want to do something to cool your PC better.
My old laptop tends to overheat easily and when it reaches 90c, everything goes to slideshow and clockspeeds drop to ground (it underclocks automatocly)