I read some of the emails on this type of chip. It came in a Compaq Presario SR1620NX. I did a diagnostic and I know it is a 939 chip. Does this mean 64 bit? It stated 32/64 somewhere, it was a while ago. I think my ram is DDR. Do I need to do anything to make it a 64 bit? When I first mentioned the chip to a software manufacturer they said it wasn't powerful enough, I explained that it was a 939 chip. They then said it was???