I'm just running on default voltage but what I can say right now is that I don't believe ram and cpu are causing the blue screen problem because I've had no problem before with same cpu along with just 2x2, and just by using 2x2 which i've tested a month ago, it still causes BSOD.
I'm also planning to get a new CPU+Motherboard in the near future, But I'm not sure if that would solve the problem. Additionally, if I end the process of Java on task management, it seems like BSOD doesn't show/or show often. (I'm not sure if its coincidence or not.)
It also seems like when I play Heroes of Newerth, the chance of BSOD appearing increases to more than 5 times.
*edit* nevermind, its just the Heroes of Newerth that causing it more often, Java doesnt have anything to do with it.