Maximum temperature for intel core 2 duo e8500?

amadeok,

If you're using Intel's stock cooler, then it's very likely it has popped a push-pin loose from the motherboard, which is a common problem. This causes poor contact pressure between the cooler and the CPU, resulting in high temperatures in BIOS, as well as in Windows at idle, and especially at 100% workload.

You can troubleshoot this problem by pushing firmly on each corner of the cooler for about 30 seconds while watching your load temperatures. When you see a significant drop, you've found the loose push-pin.

The push-pins can be deceivingly tricky to get them fully inserted through the motherboard and properly latched.

(1) To re-seat a single loose push-pin, release the latch mechanism to the retracted clockwise position, then reset it to the counterclockwise position, but do NOT push on it yet.

(2) To get the pin fully inserted through the motherboard, push only on the leg, NOT on the top of the latch.

(3) While holding the leg firmly against the motherboard with one hand, you can now push on the top of the latch with your other hand until the latch clicks.

(4) If you're re-seating the entire cooler, then be sure to latch the pins across from one another, rather than next to one another. Use an "X" pattern, so as to apply even pressure during installation.

Intel Stock Cooler Installation Guide - http://www.tomshardware.com/forum/338655-28-intel-stock-cooler-installation-guide


amadeok,

You need to read this Tom’s Sticky: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html


Intel desktop processors have thermal sensors for each Core, plus a sensor for the entire processor, so a Quad Core has five sensors. Heat originates within the Cores where Digital sensors measure Core temperatures. A single Analog sensor under the Cores measures overall CPU temperature.

Core temperature is 5C higher than CPU temperature due to sensor location. Intel's Thermal Specification is "Tcase", which is CPU temperature, not Core Temperature. Tcase for your E8500 is 72C: - http://ark.intel.com/products/33911/Intel-Core2-Duo-Processor-E8500-6M-Cache-3_16-GHz-1333-MHz-FSB

Tcase + 5 makes the corresponding Core temperature 77C. <-- This is your spec.

The relationship between Core temperature and CPU temperature is not in the Thermal Specifications; it's only found in a few engineering documents. The relationships between Ambient temperature, CPU temperatures, Core temperatures and Throttle temperatures are shown below. All values are based on Intel documentation.

Core 2 Duo 45 Nanometer: E8500 (TDP 65W)

Standard Ambient = 22C
Tcase (CPU temp) = 72C
CPU / Core offset + 5C
Tjunction (Core temp) = 77C <-- This is your spec.
Tj Max (Throttle temp) = 100C

Throttle Temperature, also called "Tj Max" (Tjunction Max), is the Thermal Specification that defines the Core temperature at which the processor will Throttle (reduce clock speed) to protect against thermal damage. Although Intel processors are capable of operating above 90C, we also know that excessive heat kills electronics. Sustained Core temperature greater than 80C is too hot for stability or processor longevity.

Ambient temperature must also be taken into account. Standard Ambient temperature is 22C, which is normal room temperature, and is a reference value for Intel’s Thermal Specifications. Knowing your Ambient temperature is important because Ambient directly affects all computer temperatures.

Here's the temperature conversions and a short scale:

Cx9/5+32=F ... or ... F-32/9x5=C ... or more simply ... an increase of 1C = an increase of 1.8F

30.0C = 86.0F Hot
29.0C = 84.2F
28.0C = 82.4F
27.0C = 80.6F
26.0C = 78.8F Warm
25.0C = 77.0F
24.0C = 75.2F
23.0C = 73.4F
22.0C = 71.6F Standard ... or ... 22.2C = 72.0F
21.0C = 69.8F
20.0C = 68.0F
19.0C = 66.2F
18.0C = 64.4F Cool

With conventional air or liquid cooling, no temperatures can be less than or equal to Ambient.

As Ambient temperature increases, thermal headroom and overclocking potential decreases.

At 22C Standard Ambient, here's the typical operating range for Core temperature:

80C Hot (100% Load)
75C Warm
70C Warm (Heavy Load)
60C Norm
50C Norm (Medium Load)
40C Norm
30C Cool (Idle)

Your highest temperatures will occur during stability tests. Temperatures are lower during real-world everyday workloads such as processor intensive applications or gaming.

CT