CPU Temperature Help

[EchoChain]

I'm looking for some help on my PC, specifically my CPU temperature. I used to have an EVGA GeForce 1060 graphics card and I recently upgraded to an MSI GeForce RTX 3070 Ti. My CPU temp before the GPU swap was idling around 38C and now it idles around 55C-58C. I have since then added more fans on the case to try and bring in more airflow but that has done little to no effect on the temperature of the CPU. 
My specs are:
MSI GeForce RTX 3070 Ti
Fractal Meshify C Tempered Glass Case
AMD Ryzen 5 3rd Gen 3600X 6 Core
MSI MPG B550 Gaming Edge Wifi Motherboard
be quiet! Dark Rock 4 CPU Cooler
CORSAIR RM850X power supply

The fans I added after the GPU swap are
Fractal Design 120mm Case fans

Is there anything to do that could be a simple solution? I would like the CPU to be in the low 40s at least. I've already tried reapplying the thermal paste and that didn't change the temp as well as cleaning out the case, radiator and fans of dust. Also, my GPU idles around 33C.
 

Of course any other advice or recommendations is appreciated. 

[Fasauceome]

Idle temps don't really matter, what's the temp of the CPU under load?

[PDifolco]

19 minutes ago, Fasauceome said:

Idle temps don't really matter, what's the temp of the CPU under load?

Agreed but idle temps should not increase by 20C on a GPU upgrade, the GPU don't even heat the case on idling... And Intel chips don't idle over 50C (they're not Ryzens  )

Maybe OP did touch/move some parts of the cooling and it's performing worse ?

[EchoChain]

50 minutes ago, Fasauceome said:

Idle temps don't really matter, what's the temp of the CPU under load?

under full load it can reach 74C but usually sits in the mid 60s when about half load

[TexasBulldog74]

Your IDLE temps went from 38c to mid 50's with only a GPU upgrade?  Really?  That just doesn't sound right.  is your GPU set to not have fans spinning at idle?  My EVGA 3080 stock came with that Zero DB function where the fans won't spin until temps go over like mid 50's... i set the fan curve on the GPU to spin at about 20% even at idle temps to bring the GPU idle temps down but to also aid air flow throughout the case but even then my 5900x was only seeing about a 5* difference which i assumed was the mid 50's temp of the GPU being right under it.

 

Try setting your GPU fan's to to max and see if your CPU idle temps change.  Im not saying leave it there but thats what I would do to try and isolate the situation.