i would like to know the diff, between the p67 and the q68?
Did you mean the difference between the P67 and the Z68?
The Z68 is the latest version. I don't think there's much difference in price and from what I've reat the Z68 is more up to date and a better chip for the Z68 MOBO's. If you're buy a new MOBO, go with a Z68 version. I'm no expert. Ask around and read around the net and here on Tom's.
I think the Z68 mobo's have onboard graphics. You wouldn't need a graphics or video card for "ordinary" computing. If you're a gamer you probably would for better gaming performance.
Do some more research. Good luck.