A:AnswerRam rhn best when in dual channel, so you would either want to add another 8 gig stick of whatever this stick is, or buy two 8 gig sticks and sell this one. If you bought two 8 gig stick and ran it with this one your pc would recognize you having 24 gigs of ram but you won't have much benefit unless you do photo editing and it won't run in dual channel but it wouldn't effect performance negatively or positively to have 3 8 gig sticks but 16 gigs will make a difference over 8. This pc might be able to support quad channel memory but I'd need to know what kind of motherboard it uses but again above 26gigs doesn't effect gaming.
A:Answeryou can buy windows games from the windows store, maybe of the Xbox franchise games are available there and some are on steam. I believe the windows store has games you can buy and play both on pc and Xbox with whatever Xbox live account you have that username linked to.
