I bought a WD 500GB SATA hard disk from newegg. I installed it in my computer. And then I formatted it. Every once in a while, it will make a peculiar ticking sound. It seemed to make this ticking sound every once in a while in the FEAR2 demo, accompanied by brief lag. I tested it in HDTach, and it was fast, so i have no idea if the disk is bad or not. Should I RMA it, wait a little bit, and then RMA or what?