D6300 Brand new slow operation

Hi, I just received my Precision M6300 Intel Core 2 Duo CPU T7250 @2.00GHz 778MHz 2.00 GB of RAM. I had loaded my core programs, nothing unordinary, programs that I have run on other Dells with no problems. The problem is that the machine runs slow compared with my Dell Latitude D620 that had a slower processor. It also has an audible click now and then when the machine is sitting idle. Is this normal or is there any diagnostic programs that I can run to determine if the machine is running optimal? Thank you in advance.