You can overclock them really high.
People are forgetting that these B die chips have 10 layered PCB's they should be the A2 revision. Typhoon shows A1 but it's a wrong read as far as I know.
AHOC has a wonderful video on YouTube about these sticks they can run 4600mhz on low latency albeit with 1.9-2v. His sample was send by G Skill so I don't know if they differ but these sticks should be one of the best produced binned single ranked B dies at the moment.
The sticks having 1.55v is not a problem. They can take much more beating. They are fine on I9's or I7's but I wouldn't recommend using them on i5 or below due to worse IMC bins but you never know when you win the lottery. I've ordered these sticks for my Ryzen 5800x I'll see how far my infinity fabric will cap me.
PS: Make sure it's the F4-4000C14D-16GTES SKU make sure it's GTES.