@ DC

Open up Task Manager under Win8 or 8.1 & disable ALL your Start-up programs.

If under earlier versions of WinBlows, open the run cmd & type "msconfig". Again, disable ALL programs you have on the start-up tab. I can not get my head around this feature of Windows. It does nothing more than soak up Ram in a very unnecessary way. A pointless feature that abuses & uses your system Ram. It might load the program quicker for when you first run the program but it also slows down your computer boot time & strips precious Ram in the process.

Also, it's not a good idea to mix Ram size modules, even more so different speed rated Ram, especially on Dual Channel boards with 4 Simm slots. If you have to, be sure you install the pair of Bigger Ram modules in the primary Dual Channel slots & a word of warning here: - Consult your Mobo manual as to which pair of Coloured Slots are the Primary Pair.