amd readon

i have intel i5 4th gen 1.6 to 2.3ghz .. and inbuilt intel 4000 hd graphics and dedicated AMD readon 8670M . the problem is that when am playing high grahpics game like COD ghost and other the temp is reaching 80 both cpu and gpu .. is it alright or i have to stop gamimg :/ :??: i have HP...