Do a lot of DRAM intensive projects, normally have an OS or two running in a VM (like Win8 and often another copy of Win 7 for testing and providing support, do some software eval work, video, imaging, CAD, GIS, etc.........depending I often set a RAMDisk for different things....As far as high freq and large amounts, it's all in what you do, you can often 'see'' a difference in DRAM freq even if you are simply doing a lot of multi-tasking