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Could be something running in the backgroundjust noticing sat in windows on the desktop my cpu temp ramps up to 49 then back to 39 and keeps doing it over and over, its never a steady temp, every now and then around a minute it will ramp up to 59 degrees and go back to 49, 39, it keeps doing it
Could be something running in the background
Windows update, virus scanner etc
Use task manager to have a look
Possibly afterburnerstuff is running but only around 0.3% of total cpu power with in task manager, firefox, msi afterbuner and a few windows background processes, would that be enough for a 10 degree jump every second?
Possibly afterburner
If got rivatuner statistics installed with afterburner it may be querying the cpu
Every so often
CCD's are the chiplets.
I have a similar cooling setup as you and a 3900x. Did you want me to test anything for you?
3900x volicity block
1080ti eg block
2x 360 rads
got the new bock installed and although load temps haven't really changed much (-5 degrees) idle spikes have completely disappeared and my cpu sits happily at 30 degrees at idle at 4.4ghz with 1.3v , gaming is better too my cpu in some cases sits just under 70 but mostly around 62-65 degrees which is a lot better, checked the old block and all seemed ok the fin array was clear and not damaged in any way.
could have been the latest bios that was the problem, I'll be sure to not update to the latest one next time