I7 2600K Safe to overclock on stock cooler>

In such a small case i would not overclock at all with the stock cooler. just let the inbuilt turbo handle things.
At 78 degree C your already pushing the thermal limits of the CPU.

Was that after 3-4 hours of stress testing or after a short check?

In such a small case with restricted air flow i would really look at getting a H80 series cooler as its going to be about the only thing that will provide enough cooling while staying small enough to fit in your case

78 degrees is ok, but less than ideal. It's never recommended to OC on a stock cooler anyways.

Thanks for your response Buddy!!

This temperature was after 3 Hours of Prime 95 testing.

I will start looking for a cooler again.

What thermal paste are you going to recommend.

Cooler master heatsinks and pastes are easier to find in my part of the world.

Please recommend some?

artic silver is great and been around for quite a while. but in the end will only make a diff of 1-2 degrees C.

look for Artic Silver 5 or MX-2

definatly look into an all in 1 water cooler tho. its about the only way your going to get the temps down and fit it in your case.

where are you located?

Thanks Buddy!!

I am based out of India, The options are a little limited over here interms of the gear.

But would a Liquid cooling solution be high on power consumption.

Another thing that i wanted to know was, if i say overclock upto 4Ghz.

During idle state say the CPU throttles down to 1.6 Ghz.

Will the system be consuming higher power in this state since its overclocked.