We have an interesting scenario, were we have 18x 8gb DDr3 RAM (identical) capable of 1333mhz. Anyhow for some reason when we install all 18 and fill up the banks memory is only configured to run at 800, but if we remove a few it will bump up to 1333.
We have 2 x X5570 and 18 x 8GB PC3L-10600R 2Rx4 all the same brand. All firmware has been updated and ram has been set to optimizer mode within the bios.
We are wondering where the bottle neck is that is causing the ram to be reduce to run at 800mhz.