CPU Running hot

[Mathiasvp]

So, i've been playing on my computer for about 2 years now, and suddenly from one day to another it starts lagging in games and going slow, so i restart it, and it tells me error, cpu is too hot or whatnot. So i dust of my fan and radiator, and put on some new thermal paste. problem isnt gone, so i figure it probably is my watercooler that has broke, but how can i be sure it isnt cpu malfunction? without picking the cooler apart.
Btw its currently as im writing this running at 75 C with no games open

 

[Colethelion321]

So, i've been playing on my computer for about 2 years now, and suddenly from one day to another it starts lagging in games and going slow, so i restart it, and it tells me error, cpu is too hot or whatnot. So i dust of my fan and radiator, and put on some new thermal paste. problem isnt gone, so i figure it probably is my watercooler that has broke, but how can i be sure it isnt cpu malfunction? without picking the cooler apart.
Btw its currently as im writing this running at 75 C with no games open

whats your CPU model?

 

[Mathiasvp]

i7-5820k 3.30GHz

 

[mdd1963]

The odds are 100 to 1 in favor of a pump failure/malfunction vs. an actual CPU failure/malfunction....perhaps higher.

Embrace the putrid colors of brown and tan!
http://noctua.at/media/catalog/product/cache/2/image/9df78eab33525d08d6e5fb8d27136e95/n/h/nh_d15_4.jpg

 

[Mathiasvp]

Just fyi, when i looked at the cooling plate on the Cpu, there was a small scratch or hole on it, is that supposed to be there, and can it be alarming?.
Thanks for the answers!

 

[mdd1963]

I would not be fretting over a scratch int he heat shield, but, a hole or large divet is another matter....; how did it get there? Via an unfortunate attempt at prying off the heatsink with a common screwdriver?

 

[Mathiasvp]

I dont know unfortunatly, just kinda noticed it.

 

[mdd1963]

75C before games start....

TIme to search for a heatsink....

Noctua!