A:AnswerIf you mean buy more of the same, this is depending on the total slots and the max capability of the processor. If it cannot utilize more then 8gb upgrading the ram or adding more is pointless. If it has 4 slots and uses 4x2gb sticks that may already be its max. If it has 4 slots and uses 2x4gb sticks it may still be capped out from the processor. Need to make sure the processor is equipped to handle the upgrade. otherwise your throwing money away.
A:AnswerI'm not sure about Rainbow Six, but it plays Overwatch on maximum settings, and For Honor on very high settings. I highly recommend replacing the stock CPU fan that comes with this PC however, it's very loud.
A:AnswerOlder games like Fallout 3 or Skyrim though you might be able to run Overwatch at Ultra but not games like The Witcher 3 or GTA 5 if at 1080P lower resolutions you could probably do it. Though these are just guesses based upon specs. Though with GTA 5 the CPU is hindering the System so if possible buy a new mother board with a Ryzen 3 and new ram because it's only DDR3 not DDR4 though if you do that you should just get the computer I linked below because then you could most certainly play games at Ultra at 1080P.
