How much of a difference in temperature would there be between a cpu with an ideal amount/spread of thermal paste, and not enough thermal paste?
I ask because every time I vacuum out my computer, I usually get an 8-10*c drop in cpu idle temp (when dusty, my AMD Athlon II X4 620 w/stock cooler idles at 47-49*c, when clean it idles at 39*C, but I've got it to drop as low as 34*C).
This time, I also decided to remove and reapply the thermal paste on the cpu. I'm using a no-name brand thermal paste (7.5W/m-k, 0.06 C-in2/W, 10% silver), I completely removed it from the cpu using 100% pure acetone (did my best to remove it from the heatsink, but after 10 minutes of scrubbing, the paper towel was still coming up with dirt, so I gave up), and then applied a half-grain-of-rice amount on the cpu and spread it out with a latex glove. I remember hearing that the ideal amount is enough so that you can just barely see the writing/logo on the cpu, but not completely cover it up, and not completely visible. That is the exact amount my cpu now has on it.
But after doing that, and vacuuming, I only got a temp drop of 2*C, much less than my normal 10*C. Did I apply the thermal paste poorly, resulting in a cpu temp INCREASE of ~7*C? Or did I apply it just fine, and there was just less dust in there than I thought there was?