With 2x1 GB the Rampage have no Problems.
But with 2x2 GB the Rampage canīt boot > 1800 MHz RAM.
With the 1:2 dividier i have up FSB 425 no go.
The RAMīs are Prime stable to 1800 MHz are not Game stable, Crysis or Race Driver Grid freeze with this RAM Frequenz >1700 MHz.