add me to the list of people with Asus boards and corsair vengeance memory that won't boot when at XMP. the fastest i can go is 3333MHz with an FSB:DRAM ratio of 100:133
asus x99 deluxe
corsair 4x4 GB DDR4 4000MHz (2 kits of CMK8GX4M2B4000C19)
-tried every BIOS
-tried putting in frequency manually
-tried 1 stick at a time with all 4 sticks
-tried different combinations of 2 sticks
-tried every possible voltage setting between 1.3V and 1.43V
-tried BLCK of 125 (to reduce multiplier)
-tried running CPU at stock speed and voltage as well as various overclock states
-probed memory for heat, only getting about 50*C thanks to the bundled vengeance memory coolers i got with the RAM
-tried different PSUs, Seasonic Snow Silent 1050W and Super Flower Leadex Titanium 1600W
-tried praying to every god i learned about in those stupid college courses they make you take for general education requirements. and there are a lot of them...
just placed an order on newegg for 4x4 G Skill 4000MHz memory. let's see how that goes.