... i5 3570 have tjmax 67degrees ...
Not quite; it seems you have confused one thermal specification for another, which is a common mistake. As my esteemed colleague,
DSzymborski, has pointed out, Tj Max for your
i5-3570 is 105°C, while Tcase is 67°C.
Here's the difference:
Intel Desktop processors have temperatures for each "Core" and a temperature for the entire "CPU". Core temperatures are measured at the heat sources near the transistor "Junctions" inside each Core where temperatures are highest. CPU temperature is instead a single measurement centered on the external surface of the CPU's "Case" or "IHS" (
Integrated
Heat
Spreader) where the cooler is seated.
Core temperature is considerably higher than CPU temperature due to differences in the proximity of sensors to heat sources.
Intel Desktop processors also have two Thermal Specifications. For Core temperature it's "Tjunction" which is also called "Tj Max" (
Temperature
Junction
Maximum) or “Throttle” temperature. For CPU temperature it's "Tcase" (
Temperature
Case) which is IHS temperature.
Both Thermal Specifications are shown in Intel’s "Datasheets", which are detailed technical documents. However, Intel's "
Product Specifications" website is a quick reference that only shows Tjunction for 7th Generation and later processors,
or Tcase for 6th Generation and earlier. This means the processor's Generation determines which of the two Thermal Specifications is shown on the website.
Tcase has always been a confusing specification. Here's why:
When users of 6th Generation and earlier processors see their Thermal Specification on Intel’s Product Specifications website, most don’t realize what Tcase actually means. As there are numerous software utilities for monitoring Core temperature, users
assume Tcase must be maximum
Core temperature. This is a basic misconception which has persisted since 2006.
Tcase is not Core temperature.
Tcase is IHS temperature. It's a
factory only surface measurement only performed on "engineering samples" using a "thermocouple" sensor.
Users can't monitor Tcase because retail processors don't have this sensor. Tcase specifications are primarily intended for use by developers of cooling solutions.
Tjunction is Core temperature. It's measured at the heat sources where temperatures are highest.
Since users can monitor Core temperatures but not IHS temperature, Core temperature is the standard for thermal measurement. Accordingly, the
limiting Thermal Specification is Tjunction;
not Tcase. For end users, this means
Tcase is an irrelevant Thermal Specification.
Here's the nominal operating range for Core temperature:
Core temperatures above 85°C are not recommended.
Core temperatures below 80°C are ideal.
There's nothing wrong with your Core temperatures. Relax and enjoy your rig.
CT