My computer (well laptop but it's really all the same thing), but uh the RAM on my computer is 504MB. I don't really know about the graphics card.
I do have one program running when I play the sims but it's like one of those picture taking things for the game, but that hasn't caused any issues before the installation of Seasons.
Oh geez, I've got LOTS of custom content in my downloads folder but I organized it and deleted at least 200-350 things. I have custom content disabled in my game now.
(Thank you Tenshii!
)