Hi I orderd a new system. Mainbord : Asus maximus vii formula i7 4790k but i am not sure which ram i buy; i want to buy this ram (G.SKILL Trident X Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 2400 (PC3 19200) Desktop Memory Model F3-2400C10D-16GTX). But my friend said 4790k is not support 2400mhz rams so u can use ur ram (my ram is 1600mhz 8gb c9, but i am not sure which brand and which model) so what can i do ?. I going to buy new ram or use my old ram.