The temperature in my room is about 27c and my idle temps for the CPU is 36 while the cores range from 36 to 39. Upon running Prime95, CPU stayed at 63c or below and the cores were slightly higher. Is this still within the acceptable range? I want to OC it a bit, but am concerned. What I have read online has left me slightly confused.
Is there anything else I should be doing? I have read about Calibration but am confused.
Maximum CPU temperature (Tcase Max) 68c + 5c = 73c Core temperatures.
Core i7 specs:
CPU (Tcase Max) 68c
Core (Tjunction) 73c
Vcore Max 1.375
Intel has stated that the Core temperature sensors (Digital Thermal Sensors) are designed for overtemp protection only, such as Throttle and Shutdown near 100c (Tjunction Max), which would correspond to a CPU temperature of 95c, and is far too hot for sane operation. Intel has further stated that the Core temperature sensors become less accurate as temperatures decrease, and should be regarded as unreliable at idle temperatures.
Unlike the Core temperature sensors, the CPU temperature sensor (Analog Thermal Diode) was designed to be linear from low idle temperatures thru high load temperatures. This is why motherboard manufacturers, as per agreement with Intel, support CPU temperature, but not Core temperatures in their monitoring utilities (such as Asus Probe) which is included on the Installation CD.
For your i7, CPU temperatures above 68c and Core temperatures above 73c should be regarded as an "overtemp" condition. As long as you don't exceed temperature or voltage specifications, you're fine.
I have been using a combination of Everest, Asus PC Probe and SpeedFan to measure my temps. They have all been providing relatively consistent temperatures. How much increase in temp should you experience as you overclock?
Temperatures increase exponentially with Vcore, however, the effects among different hardware configurations will vary according to CPU cooler efficiency, computer case cooling, graphics card(s) cooling and ambient temperature. At higher Vcore settings, temperatures may increase dramatically. For example, my i7 runs at the following values:
Vcore load 1.296
CPU temperature 60c
Core temperatures 65c
Vcore load 1.360
CPU temperature 67c
Core temperatures 72c
As you can see, an increase of just 100 Mhz, and the additional 64 milivolts of Vcore required to maintain stability, increases the temps by 7c.