I finally got my 3950X CPU, but I would like some advice

Well for starters you need to use the correct screen for gpu utilization.  The one in Task Monitor does not show the correct screen and always throws confusion for most people when they ask how to increase utilization.

You need to change the screen view from graphics to CUDA with a right-click menu on the memory utilization screen.  You might have to do the same in your monitor program which I am not familiar with.

As far as temps are concerned I am more familiar with the Hwinfo monitor program which reports the official AMD temps at Tdie and Tctrl.  Tdie is the correct one showing how the cpu is going to respond to the thermal and power limits that are hard wired into the cpu.

I would say you are probably in good shape if the 68° C. is the same as Tdie.  Normally the gpu that is both feeding the screen and doing crunching is going to be hotter than a card that is just crunching.  Also the card at the top next to the cpu is usually more hampered in airflow than a lower card that is out in the open with full airflow to the card.  Remember in the typical vertically mounted mobo, that heat rises and the lower card dumps its heat output onto the cards above it.   Modern gpus don't even run their fans until the card hits some manufacturer specified temp limit in the attempt to produce a silent running card until it is stressed by several hours of intense gaming.

Did you set your memory to XMP timings in the BIOS?  It looks like you did not if the primary timings are showing 22 clocks. Your primary latency timing should be 14 clocks at XMP.  I think you are running your sticks at default JEDEC 2133 timings. I think this is your kit since you show 32GB.  You have dual rank sticks.

F4-3200C14D-32GTZN

Go into the BIOS on the Extreme Tweaker tab and select the AI Overclock Tuner function and change it from Default to D.O.C.P Standard setting and then save the settings and reboot.  You should see your RAM identified on the main page of the BIOS running at 3200 and 1.35V. If you select the Memory Timings selection you see the primary timings set just like it shows on the G.Skill product page I linked as 14-14-14-34.

These sticks are made with Samsung B-dies, the best overclocking memory so far produced for Ryzen.  Those sticks are easily made to run at 3600Mhz CL14 at FCLK=1800Mhz.  The RAM Calculator I linked in my previous post will show the memory timings you should plug into the memory timings page for 3600@FCLK=1800Mhz.

I see I was wrong in my guesstimate of your RAM.  I didn't notice the explicit kit number for 8GB sticks in your post.  So you have 4 sticks of 8GB for a 32GB total.  That actually makes it simpler in some cases to set optimum timings with single rank memory.

I also skipped over your memory temps.  Stay in the 40's is the goal.  Once you move into the 50's, the overclocking gets harder and usually requires some active memory cooling with increased airflow to the sticks.  Either with a dedicated memory cooler fan or just an AIO cooler installed in the top which pulls air past the sticks to cool the radiator.

The new Trident Neo sticks are supposed to be pretty good overclockers.  I have the Trident Z predecessors without the RGB bling.  The RGB sticks run a bit hotter since they have all the active RGB LED's and driver components adding to the stick power.

1.8V on the CPU?? are you sure? that's like liquid nitrogen level voltages. if it's really running that, you need to change that like now. that's wayyyy too much.

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I'm positive you are not running 1.85V or the cpu would be dead.  I suspect that your HWmonitor program is misbehaving.

Good that you got your RAM at least running its rated XMP specification.  But that spec is just the minimum that the manufacturer tested for.  I am sure it will overclock higher being B-die.

But every BIOS is different for every manufacturer.  All the BIOS features are normally reserved for the higher price tier motherboards and the lower tier boards often have a very cut down BIOS with features completely missing or locked out.  Nothing you can do about that unless you are willing to use a modified BIOS that a overclocker has unlocked for your board.  But the X470 Prime Pro motherboard is NOT a lower tier board, more midlevel and quite capable of running your 3950X well if tuned correctly. You should ask for help in the forums for pointers on where to find things in the BIOS.

Have you joined the forum for that board yet?

My experience with the Asus PRIME X370-Pro 

ASUS PRIME X470-PRO (Issues and Successes)

You can start with the old Prime Pro X370 threads.  There is very little difference in the two generations.  More older information there. Then move on to the dedicated X470 Prime Pro thread