Damn, themightyyw didnt want to leave anything out did you? LOL, Im just messing around. What type of RAM is it. What brand? First impression is well hell, I dont know, that could happen if you had two different frequencies of RAM in there, like one stick was PC3200 and the other was PC2700. You said it only goes to the BSOD when you try to do something memory intensive, like what. How memory intensive?