Well, I tested both modules, and one of them turned out to be faulty. The other stick works, I can use my PC with it for now. And Corsair’s customer support turns out to be really handy; they can send a replacement first for a deposit, and after I receive it, I can send the faulty one back. And once they receive it, I can get the deposit back.
So it’s all (kinda) good now, regarding my PC.
1000 Terabytes (TB) = 1 Petabyte (PB).
Or: 1024 Tebibytes (TiB) = 1 Pebibyte (PiB)
Or: 1024 Terabytes (TB) = 1.024 Petabytes (PB)
Or: 1024 Terabytes (TB) = 1 Petabyte (TB), 24 Terabytes (TB)
But: 1024 Terabytes (TB) != 1 Petabyte (PB)