CPU temp -what is too hot?

[Drewb]

A friend of mine has an i5-2500k 3.3ghz cpu on an Asus P8Z68-V Gen3 mobo. She is getting the occasional bsod and I asked her to install the Asus monitoring software.
The fans are all working around 900rpm including the CPU fan but the cpu temperature can reach 83C after a long usage.
Although since installing the monitoring software there have been no bsods, is 83 too hot and could that be the cause of the crashes?
I should point out she uses on board graphics and doesn't play games, it's mostly office work and photos or music.

 

[Drewb]

Not overclocked. It is using a stock cooler though.
Sounds like it's too hot doesn't it?

 

[Drewb]

Thanks for the replies folks. The PC was sitting under a desk too close to the back panel for the rear fans to be effective, it has been moved slightly forward now. It also sits directly on a carpet.
Will take on board the suggestion to reseat the cooler and take it from there.

 

[Drewb]

How is the airflow in the case?

Should be fairly good. There it is a large case with no graphics card, 1 SSD and 1 HDD.