I have A dell Studio 1569 machine running W7 home premium 64bit. It came with a 2x2 ram and I recently upgraded it to 2x4 and have 8gb now, the computers maximum. However now when ever I play minecraft, it crashes quite often. Today its done it about 5 times. I even bought a cooling pad so overheating is not the answer. It botos up fine but onyl when gaming or doing intensive activities. At first I allocated 4gb to minecraft however it still crashed. I then alloocated 3 leaving 5 behind and it still crashed. Before it used to crash when gaming but not as much maybe 2 a month. I had also updated the internal Graphics and the service pack when I got the ram so maybe I am frying the graphics.