The two images of ram you see above are from the same coupon of ram, one picture of each sticker.
The 8 sticks are identical. In fact these same 8 sticks of ram registered as 64GB on a different rampage V extreme. This is why I suspect bios settings or jumper settings. I was hoping you had seen something like this before and would perhaps know if it is related to voltage or something.
It's all from the same kit. I can swap them around at random and it's the same result. Quite frustrating! Anyway - thanks again
If this is a single 64GB kit and it has been tested on another Rampage V Extreme, then you can inspect the CPU socket for any bent or missing pins. Also make sure you didn't overtightened the screws for your heatsink during installation.