Hey, sorry if this question has been asked before. I have 4GB of G.Skill ripjaws at 1600mhz and was wondering if I should mix them with my 1333MHz 2GB stick and run all the ram at 1333 for 6GB, or just take out my 2GB and run with 4GB of 1600mhz. What do you guys think would result in better performance? Also I am running windows 7 ultimate x64bit, so there is no memory cap.
I would just run with 4GB at DDR3 1600. It keeps you 1) running dual-channel and 2) from mixing memory. Though you can mix memory, I tend to recommend to avoid doing so if possible to decrease the potential risk of BSOD for them "not playing nice with each other".
Mix-Match is a bad idea, and the memory needs 'should' be installed in pairs.
At best mixing you only get the WORST of each.
1600 9-9-9-24 @ 1.6V ; often 1600 rated also has lower CAS at lower speeds.
1333 7-7-7-25 @ 1.5V
1333 9-9-9-25 @ 1.55V ; so the s-l-o-w-e-s-t wins - IF it will work. Review your Manual 9/10 it states 'PAIRS'.