Well i really didn't find time to go to the service center again, So i thought I'll examine the card before giving it back. I opened the heatsink of the card and was shocked too see the way the thermal paste was applied. It was a thick paste which was unevenly spread and it was dry. I'm so sure my dog can apply the paste better. So i removed the pasted with some alcohol swab bought from the chemist(70% isoproplyl alcohol) and cleaned it up and then i applied some pasted from the TIM i got along with the CM Hyper TX3. I know there are better pastes, but right now the MX-2 is out of stock.
Anyhow on running the card, its significantly cooler, and i ran furmark for 15 minutes, and the max temp it touched was 93 degrees Celsius. I could notice a few artifacts, but i played Bad company 2 for about 10-15 minutes and no artifacts had appeared and the card had touched ~80 degrees.
I guess the way the TIM was applied was the problem all along. I will apply MX-2 once i get my hands on it...
Thanks to everyone for the help. I really appreciate it.
Regards,
Nj