Is that a thing that can happen? i made my computer a couple of days ago and my cpu cooler was moving around a bit when ever i touched it so i decided i would tighten it more today and i ended up making the idle temps 25degrees c instead of 28-29degrees. is that what can happen when it is tighter on the cpu?
its not a big difference in anyway but i thought it was cool that it actually helped drop the temps
if it was a bit wobly to the touch it wasn't properly secured to begin with im surprised you only got 4 more degrees i would expect a bit more at least 10 but yeah thats good for you