MEC-777 :
WD Blue HDD's are pretty decent, although not SSD fast, obviously. lol
Not sure what's going on. How many background apps do you usually have running? What's your CPU temps?
I usually only have system processes running, my HP printer's software (required and always had it for the old setup as well), antivirus (same for old setup), and realtek audio manager.
CPU temps range from 38-45, checked with CoreTemp and Speedfan. Occasionally while gaming, I'll notice it goes up to 50-55 but otherwise it's usually at 38 when idling. I haven't done any intensive media editing so I don't have temperatures for that.