cpu is 40-50C when almost idle end gets 75C when playing games.

[difikoll]

So I just bought a pc (second hand) and it's great, working perfectly. But one concern i have is the temperature. When im just browsing the internet it stays around 40-45. When i start a game like dota 2 or NV and play it for a while, it gets hot (i think) about 75C. It's a Intel i7 960 4 cores 3.2ghz.
I dont know if its overclock or not (i should check that), nether do i know if my heat sink is working as it should. This is my first pc (i have been runing laptops) and if this is to hot pleas tell me and tell me how to fix it. Also if you could tell me how to se if my heat sink is active it would be great. Thx

 

[Eliasand]

That's quite a high temperature. Download CPU-Z http://www.cpuid.com/softwares/cpu-z.html , and check the voltages and clock speeds. It should be running at 3.2ghz if it's not overclocked. The voltage should be 1.375 at max.
To reduce temperatute, take off your heatsink and clean out any dust that it contains, same thing for the fan(s). Apply new thermal paste, preferrably Arctic Silver 5, and check temps again.

 

[difikoll]

Thx, i'll look into it.

 

[difikoll]

Soo i lookt into it Voltage is about 1.1-1.2 and then the core speed is about 3.3-3.4, that means its overclockt right?

 

[Eliasand]

Soo i lookt into it Voltage is about 1.1-1.2 and then the core speed is about 3.3-3.4, that means its overclockt right?

Not necessarily, since the CPU can turbo up to 3.4 under load. The voltages are fine. Is the heatsink stock, or is it a beefier aftermarket one? Either way, you could try re-applying the thermal paste. It doesn't really matter which one, but the Arctic MX4 is a best-performer. http://www.newegg.com/Product/Product.aspx?Item=N82E16835186038&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-Skimlinks-_-na-_-na-_-na&AID=12087162&PID=3899435&SID=skim1402X558040X87f365cec3e94c5cab649c8d386806bd&utm_medium=affiliates&utm_source=afc-Skimlinks

 

[difikoll]

Thx a lot for the help, heatsink is stock, ill save upp for some thermal paste and a new heatsink