here's a pdf chart of ram that is compatible with your motherboard
http://dlcdnet.asus.com/pub/ASUS/mb/LGA2011/RAMPAGE_V_EDITION_10/R5E10-QVL.pdf
also make sure to check into (CAS) latency
the lower the latency the better.
the link below should give you more information on latency
http://www.crucial.com/usa/en/memory-performance-speed-latency
http://dlcdnet.asus.com/pub/ASUS/mb/LGA2011/RAMPAGE_V_EDITION_10/R5E10-QVL.pdf
also make sure to check into (CAS) latency
the lower the latency the better.
the link below should give you more information on latency
http://www.crucial.com/usa/en/memory-performance-speed-latency