See how many channels of memory the motherboard supports, the general home machine only supports dual channel memory, x58 motherboard supports 3 channels, x79 and x99 support 4 channels, dual 1366 support 6 channels, dual 2011 support 8 channels, so if you are a general home machine motherboard only supports dual channel memory, So 2x8G and 4x4G performance is almost no difference, X79 and x99, four channel memory bandwidth than double the double channel, but almost can not experience, when the DIY installation should be how to choose? A: Generally choose the motherboard with more memory slots the better, because the general dual-channel home computer motherboard is generally 2 memory slots to 4 memory slots, B150 and z170 may be better, they all support a single 16GB DDR4 memory, then the motherboard will support 32-64GB maximum memory, Z87,B85, H81, B75, and more. H71, H61 can only support a single 8GB DDR3 memory, then the motherboard will support 16-32GB maximum memory, in the CPU performance excess, memory is never too much today, the motherboard is likely to be eliminated because the maximum memory is too small