Not dual rank- even though they are 16GB modules. But Corsair does not write that on their website as they know that single-rank has poorer performance.
One more thing. My older 3200MHz modules clock better than these.
Recommend saving money and buying lower speeds and then clocking higher yourself.
It's super easy with the Ryzen DRAM calculator.
But if you feel that it is very nervous with overclocking, these are perfectly okay. Just turn on the XMP 2 profile in the BIOS, save the settings and then run.