_danielpwils01 :
Well I just now noticed something as well. About a month ago my CPU (an i5-6600k) ran around 26c at idle in the BIOS (My CPU Cooler is the Hyper 212 EVO). I just went into my BIOS again and my CPU was sitting at around 43c. Woah. Im a little freaked out. Could dust alone have that big of an impact after just a month or two or could it be something else? Maybe I will just take a can of compressed air to the heatsink quickly and see if that makes any differences?
Yes, it absolutely could. If it accumulated a bunch of dust in that time it's certainly possible. However...
Measuring idle temps is a little tricky, particularly on Skylake and Kabylake CPUs. Windows is often doing things in the background causing little spikes in CPU load. Skylake (and Kabylake) CPUs temperature can change very quickly, so getting a real baseline idle measurement is a little luck of the draw. In any case, idle temps don't really matter much. You need to know whether your temps are under control at load. That's when you need to worry.
It's a good idea to get a can of compressed air and clean it out. You can use it multiple times, and you can see how much dust comes out of your system when you clean it. Over time you can get a sense of how quickly your particular computer needs to be cleaned out. Having said that, if the load CPU and GPU temps are fine, and you can't physically see large amounts of dust around the PSU and VRMs on the motherboard, then there's no problem.