Quote:It has been working at 80ºC for 5 years without any problem.
80C under full load is not the same as saying it has been running at 80C for 4 years, it has not been under heavy load that entire time.
And for the record 80C is right on the edge of what is considered safe and unsafe for sandy bridge.
Quote:In fact I have contacted with my hardware provider and they said it's Ok as long as under 120ºC.
Then whoever you spoke to is a complete idiot, that's physically impossible. Silicon MELTS at 120C. Most modern cpus are designed to remain under 70C but some of the better architectures can remain safe at 80C or in some rare cases even 85-90C. No cpu ever made in the last 40 years has been able to remain stable above 100C, that is a fact. Older cpus were a lot less tolerant of high temperatures, even the best models would begin to show microcode bugs at temperatures above 50C.
You have a sandy bridge architecture which is safe long term up to about 80C, it will function in the 81-90C range just fine but it is not safe for long term use. At 100C the system will shut down to prevent permanent damage. Don't believe me? Try it. Or better yet look up the Tj max for your cpu model, it's 100C just like all sandy bridge chips.
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-Ron Swanson
"I shall be a good politician, even if it kills me. Or if it kills anyone else for that matter. "
-Mark Antony