RAM is very sensitive component in PC. My advice for you would be to try it before buying. I had RAMs with different brands and timings and they both worked together and I had a case where I tried a lot of RAMs and 90% didn't run. To be more specific, my wife's motherboard P7-H55-M LX with i3 540... They have 2+2GB Geil brand RAMs with 1333mhz that work fine. In the past, I had G.Skill Ripjwas of 1600mhz 4+4GB RAM. This motherboard doesn't support 1600mhz, but it still was running those memory sticks fine, probably automatically it set those RAMs on 1333mhz. Anyway, this motherboard now doesn't have those Ripjaws (I sold them and downgraded to those Geils and now when my wife is using this PC, I decided to upgrade her RAM again back to 8GB). I bought brand new 1600mhz Team Elite's from shop. PC should run them, but it didn't. It was restarting over and over. Then I went to other place. They tried a lot of RAMs, starting from 1333mhz and ending with 2400mhz, all different models and brands. None of them worked! And funny thing is that my own memory sticks - G.Skill Trident X 2400mhz - they worked fine when I tested them at home.
So, I would strongly suggest to try them before buying.