Used to have 50-60 while gaming now its 70-85

Mar 1, 2018
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MY cpu is i77700k kabylake with kraken x62 liquid cooler.
The thing is that i play only one game and usually my temp is around 50 while i play it but
one day out of nowhere my temp started hitting around 70-85 and i don't see any blue
screen or like lag spikes but still it keeps me thinking if like my air flow or something is
wrong cuz like really i don't know if there a problem or just me overreacting but i just
want to ensure so if anyone who know please help!
Sorry for my english btw^^