ayoubiee,
On behalf of Tom's Moderator Team, welcome aboard!
There are 2 versions of the Q6600:
(1) Original version B3 Stepping Revision - 105 Watts Thermal Design Power (TDP)
(2) Later version G0 Stepping Revision - 95 Watts Thermal Design Power (TDP)
Download and run CPU-Z to identify the Stepping Revision of your Q6600:
• CPU-Z -
http://www.cpuid.com/softwares/cpu-z.html
If you live in the Southern half of the world in a hot summer climate, and your ambient (room) temperature is high (30°C to 40°C), it will make your Core temperatures high.
If the bottom of the stock CPU cooler has a copper center, then it's the correct stock cooler. If the bottom of the cooler is all aluminum, then it's the wrong cooler, probably from a 65 Watt TDP Dual Core CPU that can't properly cool the Q6600 under load.
The most common high temperature problems with stock coolers are caused by one of the push-pins that's not latched completely through the motherboard, or has popped loose from the motherboard. The push-pins can be very tricky to get them latched completely through the motherboard, so check each push-pin very carefully using a strong light.
If you can't see a loose push-pin, then firmly push down and hold each corner of the cooler against the motherboard for about 45 seconds while watching your core temperatures. Check each corner one at a time. If you see the temperature drop, you've found a loose push-pin.
Also, make sure that the CPU cooler fan isn't worn out, and can still run at full speed.
Once again, welcome aboard!
CT