hey i want to use duel channel memory mode on my HP elitedesk 800 g1 pc. The motherboard support duel channel. The computer came with the 4 GB DDR3 1600 MHZ stick. if i buy another 4 GB (1600) Stick and put into duel channel slots. Will it work as duel channel or do i need to buy a pair of 4GB RAMS of same manufacturer that comes in same packet for duel channel performance? thankx