A:Answer Currently this computer cannot have any RAM added to it. 16 Gigabytes of RAM is definitely all you would need. Honestly you really only need 8 Gig of RAM to be able to run even the most power hungry games that would require a high amount of multitasking. Now for your question about the power supply, I'm not sure about the actual power supply, But from the reviews I would definitely suggest getting a new one. (Atleast 500 Watts) 600 would be plenty for a power supply bc this is not a top of the line desktop.