[SOLVED] Why is CPU temp inconsistent?

[Becky_Sadler]

for whatever reason my cpu temp will stay at 30-35c on some days to 50c on others even with the same apps on.

 

[JohnBonhamsGhost]

cpu temp will stay at 30-35c on some days to 50c on others even with the same apps

can be ambient temperature fluctuating.
can be background processes using more system resources at odd times.

include your complete system specs with make & model of all components
along with your system-wide cooling setup including any custom fan curves/profiles you have setup.

 

[lvt]

CPU temp will never be constant, it can jump up and down depending on the current usage.

Background activities like software update, virus scanning... would greatly affect the CPU usage.

 

[Becky_Sadler]

can be ambient temperature fluctuating.
can be background processes using more system resources at odd times.

include your complete system specs with make & model of all components
along with your system-wide cooling setup including any custom fan curves/profiles you have setup.

Evga 1660 super ryzen 7 3800x 32gb t force b450 elite 650W Thermaltake veetro 5 cpu air cooler one fan and 2 front and 1 back outake fan stock fan profiles

 

[Multyspeed]

for whatever reason my cpu temp will stay at 30-35c on some days to 50c on others even with the same apps on.

Most of the time its the OS. As lvt says - background processes.
My 9700K (and every other CPU) does this from time to time - it's normal. Other night while my windows was updating my cpu reached 60C.

 

[Karadjgne]

Intels at idle use all the cores, so if you have an 8 core cpu, and 160 services/processes running, that's roughly 20 per core with only a couple starting/stopping per core. Since temp sensors only report the hottest core, you get a pretty steady state of flipping between core temps.

Ryzen are the opposite. At idle, all the cores are inactive, unused, except 1. All 160 services and processes lumped onto a single core. So that core is going to see higher idle temps with that load, and will read that particular core temp constantly. You'll see spikes in temps as services and processes start/stop because the 40°C of that core is hotter than the other 7 cores sleeping peacefully at 30°C

Soon as you do anything, hit a key, move the mouse in the slightest, 256milliseconds later All cores are fully active and awake, background tasks are put on hold, and the remaining services and processes are then split back up to the full amount of cores, and temps drop as a result, going from 40-60° spikes down to low-mid 30° range with occasional 40ish°C spike.

Perfectly normal, typical Ryzen behavior. Outside influences like ambient room temps, case airflow etc will somewhat affect the temps, depending on settings.