Not sure what causes this but my ram is running at 800mhz. In the bios it is set to run at 1600(or 1648 or something weird like that). I use cpu-z to check the speed. CPU is i-7 2600k clocked at 4.2. BLCK is 104. Also it is 4x4g ram so, maybe if I need to switch to 2x4g ram??? If so would less ram at a higher speed be better for gaming?? I currently only see 20-30% ram usage MAX.