Well, since yesterday, I know that my blue screens are caused by the wrongly matched RAM sticks (2 DDR 800 patriots 1gb each and 1 DDR 667 kingmax 2 gb). Which Ram stick should I buy to fight the incompability with the kingmax stick? I don't want to sacrifice 2 GB ram and have only 2 GB left, as then I would be barely able to play any of the modern games. Most preferable one would be a stick with 2 or 4 GB ram. And just on a side note, why didn't the same thing happen on XP? I've never had bsods there despite I played same games and same hardware.