computer shutting down due to cpu overheating

[arkode89]

i have
intel corei5 760 and
asus p7h55 motherboard
6gb ram an
nvdia gt240 and
600w coolermaster psu.
Earlier i had a 600w zebronics psu which rescently gone out of service so that i installed the coolermaster psu which was working parfectly for near 2month but rescently it started causing problem i.e the psu fan doesn't start on its own but starts spinning when poked which i thaught causing the cpu to overheat and shutdown.the back pannel of the cabinet was also not grounded perfectly but i have checked the earthing which is fine. I have replaced the psu but the problem persists. there is no other over heating in anywhere in the motherboard.only the cpu over heats. It boots with a temp of 51degC and when i run any installation the temp rises very very fast and reach 72degC in just 3or 4 sec. I am curious which may cause the problem. i have a 1tb seagate sata hdd and an old 250gb sata seagate hdd. Please suggest which may be the cause of problem.
my emailid:arkode@gmail.com

 

[prit87]

open the case remove the cpu heatsink clear the dust remove the existing thermal paste with cleaning alcohol reapply the thermal paste just a drop and press the heatsink over it .

i hope it solves your problem.

 

[arkode89]

Already did it no improvement thats why i asked for help!!

 

[prit87]

Then i would recommend to get an aftermarket cooler for the CPU.

 

[arkode89]

then i assume there is no fault in motherboard or any other components.
can you please tell me why did the psu fan stopped spinning on its own and the back panel was giving a little bit of shock in there any other factor?? Did by any means my motherboard or graphics card or any other components got damaged?

 

[prit87]

i dont think the board or GPU is damaged you must use the warranty and replace the PSU .

 

[arkode89]

yes i did it as i mentioned earlier but I don't know why the problem remains strong!! i.e the heating problem.

 

[prit87]

If you want to solve the heating problem then you better get an after market cooler like CM hyper 212 evo.

 

[arkode89]

does openig cpu and improper installation of cpu can cause any heating problem?? The highest temp on my pc used to be 63degree but today it was 67degree... what should be the safety threshold temp??

 

[prit87]

67 c is completely safe and fine below 80c is safe.