http://www.overclockers.com/articles1364/
The CPU will always do processing. Even though there are no application programs running, the operating system is still running and the CPU will still have to process many system processes during the operation of the computer.
It could be that you are running something that causes the CPU to be running at 100% all the time, or you have concurrent apps/processes that are keeping the CPU awake (same effect as the CPU running 100% all the time).
If the CPU is running, but the monitor has no signal, there could be an issue with the cable that connects the CPU to the monitor. There could also be a problem with the VGA card, or the RAM.
The average cost of a CPU fan will vary depending on which country one is buying from. In the United States the cost of a CPU is usually between $8 and $30.
Time of CPU usage per minute, Number of processes running at once
After the system is up and running you can check the CPU and motherboard temperatures by entering setup?
Operating System
It depends on the exact CPU, if you are running it according to rated speed, and if you adequately cooling it.
500000000000000000000000000000000000 bucks
My PC is running the 3.0 Ghz Core 2 Duo from Intel. - PageFault
Preemptive scheduler reruns scheduling decision when process becomes ready. If the new process has priority over running process, the CPU preempts the running process and executes the new process. Non-preemptive scheduler only does scheduling decision when running process voluntarily gives up CPU. In effect, it allows every running process to finish its CPU burst.
Intel CPU processors have a very stable price, they don't differ a lot from the CPU processors of AMD but AMD has more discount offers on it's CPU processors which in some occassions give them a better cost to performance ratio. In other words, buying an AMD processor with a good discount might just beat the Intel CPU processor cost to performance ratio.