my processor is overheating

[scomp]

I have newly installed

intel duo core processor 3 GHZ with intel 945 GCNL motherboard. I assemble every thing. But when I turn the cpu on. It automatically turns off after about 5 seconds.

When I reboot, I hear a siren beeping two times and then the cpu turns off.

I have only one heatsink and fan( that comes with the processor) and is working properly.

Do anyone help me please. I don't know what to do.

I shall be very very thankful.

[ale52]

Disassemble everything so that the only things connected to the motherboard are the:
cpu / cpu fan / RAM / power supply.  Reseat the cpu/RAM &b power supply connections.  Boot and see what happens.

If it still does the same thing, remove the motherboard from the case / reconnect as above and try again. 

If that still doesn't work you have a bad cpu/RAM/power supply/motherboard.

Alan <>< 

[soybean]

Do you follow correct procedure in applying thermal paste to the processor before mounting the heatsink on it?

[scomp]

how can i apply thermal paste, do i have to buy it separately because paste is not given with the processor.

and processor book also haven't mention anything about it

[soybean]

Did you buy the heatsink and fan separately?  Did the heatsink have a thermal pad on it?  Did installation instructions come with the heatsink?

See Installing a CPU and Heatsink

[scomp]

yes sir,

  the processor came in a sealed packet with heat sink and fan, heat sink and fan are of new round shape.

There is only a intel book which have not mention of thermal paste. do it come separately.

A slight paste in there on the top of the processor and lower part of the heat sink. but it is not enough i think only slight paste.

[soybean]

The language translation is a bit difficult to understand and I'm not quite sure exactly what you've done during the process of assembling your computer.

So, I think you should carefully read How To Correctly Apply Thermal Grease, remove your heatsink, clean the old thermal compound off of it, and apply new thermal paste/grease as explained in the article.