Does anyone know why my blade's RAM clock speed is at 1600MHz?

I was unable to find any options in the BIOS to change this, the BIOS options in general look quite limited.



The RAM it shipped with was at 2933 IIRC but as it was only 16GB I swapped it out for 32GB of 3200MHz RAM, however after this swap it seems it is actually only running at 1600MHz