i have a pc using 4 sticks of 2gb ddr3 ram, so 8gb total, my motherboard is able to support up to 32gb, and i have access to an 8gb ddr3 ram stick and would like to use it for my pc, how should i go about doing this? can i simply take out any stick and replace it with the 8gb to give me a total of 14gb or do i have to re arrange the sticks in a certain configuration?