I have a Dell Inspiron 17 7737, the temperature at Idle reaches 68 degrees and cpu fan speed 3798 rpm. Now I have already redo the thermal paste and I checked the cpu fan it is working fine. What could be causing the device to overheat?
Dell's Inspiron 17 7737 specifications show you could have a CPU from three different families of Intel Core Fourth Generation: an i3 , i5, or i7. You cjhecked, and found you have the i7-4500U.
Intel's specifications show the T-Junction, the maximum temperature allowed at the processor die, is 100 degrees Centigrade.
Therefore, this is not a severe problem.
What could cause it?
A) Dust, dirt, and hair could accumulate within and block the airflow needed to cool the CPU. Solution: Open it and clean it.
B) The CPU fan in this six-and-a-half year old machine may be deteriorating. Solution: Replace the fan.
C) Software installed since installation may have altered the fan configuration. Test: Create a LiveUSB and boot from that instead of your internal drive's OS. Does the fan still run at appx 3800 RPM? If so, then see A) and B).