The CPU and the memory have no affect on what the interface for the graphics card is.
That being said, you seem to have a pre-built computer I am guessing. Probably one of those silver HP's like mine based on the 3GB of ram, signifying a 32-bit OS.
If you do have a pre-built, you can just give us the model. If not, give us the model of the motherboard.
Here are some examples: