What is the optimal temperature of the processor I have 70-75 degrees processor i5-3570 load 100 percent in
the max temp on Intel is 90-95c before throttling and thermal shutdown.
the max temp on AMD is 65-70c before throttling and thermal shutdown.
Since you are running it for extended periods of time,
I would recommend to keep it below 70.
The easiest trick is to slow it down to 90% using windows advanced power settings.
Harder tricks include buyng an aftermarket cooler or undervolting slightly.
Consider also the heat which will take all the MB capacitors around the CPU.
You can add an exhaust fan to help cooling.