I recently decided to upgrade ram to 2x8Gb Corsair Vengeance Pro 2400 MHz from 2x4Gb Crucial Ballistic, yet when I'm in my BIOS, the maximum frequency I can select is 1600 MHz despite support for up to 2400MH (on 22nm CPU chips which I have).
B75MA-P45 MSI Motherboard
Intel i5 3570k 3.4GHz CPU
Corsair 2x8Gb 2400MH RAM
Something to note is in the BIOS, it identifies the ram properly at 2400MHz and is able to properly detect the timings, it just automatically adjusts the frequency down. The BIOS version is 1.9 which should be the most up to date.
B75MA-P45 MSI Motherboard
Intel i5 3570k 3.4GHz CPU
Corsair 2x8Gb 2400MH RAM
Something to note is in the BIOS, it identifies the ram properly at 2400MHz and is able to properly detect the timings, it just automatically adjusts the frequency down. The BIOS version is 1.9 which should be the most up to date.