Need Help Picking RAM

[GrungyHobo]

I need some suggestions for some badass Ram I need 4G, is DDR3 worth it?

 

[2048Megabytes]

Read this all the posts in this link about Double Data Rate 3 memory:

http://www.computerforum.com/105185-there-any-need-go-greater-than-800mhz-use-ddr3.html