Mixing RAM rarely causes stability issues, but it's best to try avoiding being put in a situation where your system doesn't run properly or doesn't run at all because you are mixing RAM. You can have two modules of the same brand say Corsair yet both modules use chips from different manufacturers and therefor they do not work well together.
Brand has little to do with RAM compatibility. If you have the cash, go for the 16, if not, just buy that one stick! again! it does not even have to be the exact same brand, modern MB, if proper, can easily run them without issues.
That being said, I reckon most people are not even running 3200mhz (not all mb´s allow and you have to do it manually in bios)ġ6 gb should also be enough for the forseeable future, if it is just for gaming All the 'you need the same brand, same duals, etc' is old myths. Better than a larger module running in single. If you really need more memory and have 2 available Dimm slots I'd go for 2 x 4GB modules so they will also run in dual mode. so a 3rd module would run in single mode. If you have 4 Dimm slots you can run up to two sets of memory in dual mode. Originally posted by Suicidal Monkey:Dual channel is when they are in paired Dimm slots on your motherboard.