i asked only one question and u asked me 5 questions??
anyhome.. i want to buy 512mb coz of budget. i just want to play games as maxpyne3 and GTA4 etc..
But pretty much dont limit your self to 512MB of ram if anything get 1GB..Also whats your resolution that way we can guild you on a better path..The higher the res tho the more vram it uses so keep that in mind