I have the following memory and it's identical to yours as far as I can tell other than mine is black and yours is white.  I bought 2 kits of the 2x16gb as I wanted to go up to 64gb as well using 4 sticks in total.  I plugged them into my R11 and booted up with zero problems, but I do recall first checking in the Dell Bios (before removing the old sticks, I started up and hit the Function key to launch the Bios program) that under the Performance section of the Bios that the XMP profiles were enabled.  I also did one other thing before turning off the PC when it was using the old Dell ram....I disabled the "fast start" option in Windows 10 as I read somewhere that might help when installing new RAM after a shut down, but I don't fully understand why that would matter.  Also, when I installed the new sticks I do recall having to seat them firmly until the tab clicked them into place.  I too used CPU-Z utility to check them out after launch and they defaulted to 3200mhz under the Bios XMP profile selected....so didn't have to use AWCC program to modify that.  As far as I know the R12 is very similar to the R11 and you aren't trying to use 3400 mhz or higher sticks. Good luck.  Search on Reddit too as R12s are out long enough now that others might have also tried to get to 64gb using aftermarket RAM.  The Cruicial Ballistic is very popular with R10/R11 and I think I have seen R12 users in Reddit post there and here about using those sticks in 3200 speed.   Crucial Ballistix 3200 MHz DDR4 DRAM Desktop Gaming Memory Kit 32GB (16GBx2) CL16 BL2K16G32C16U4B (Black)
Just received my R12, pulled out the Dell provided 8GB stick and tried to put in 4x16 sticks of Corsair Ballistix, made of 2 sets of BL2K16G32C16U4W which are listed guaranteed compatible from Crucial's R12 page. With all 4x16 sticks in, power comes on but it won't boot, not even into BIOS. However it will boot with no problem with any combination of 2x16 sticks. So I'm currently stuck at 32GB, any ideas? I've checked for any firmware updated but it says I'm all caught up.
Aurora R12, 64GB 4x16 not working