I bought new 2TB HDD and i was using a 500GB before. I tried "long test" for both the HDD. and they passed very nicely. But dont know why a slight click sound coming from cpu. I suspect it is from the 500GB. I changed the smps, it is a normal SMPS but last 3year I was using this type of SMPS with 2 500GB HDD and now I just replaced one 500GB with a 2TB.
SMPS has 12volt 19A power rating.
SMPS has 12volt 19A power rating.