How can I find out whats causing my blue screens?

[Soul934]

Im using Windows 7 Professional, 64 bit, my build being here:
http://pcpartpicker.com/user/Soul934/saved/1irg
Anyways, randomly ill get Blue Screens. it could be while on the internet, playing games, anything
Every time it says MEMORY_ERROR or something.
How can i find out whats causing it and how to fix it?

 

[clutchc]

First, Id run memtest on each stick of memory individually for at least one full pass to verify they were good.
http://www.memtest.org/
(download the .ISO file and burn it to CD. Then boot to the CD)