"is it possible to use my current ram (2x1gb sticks) with the new ones " If you used the 1066mhz ram with the 800mhz ram the ram would run at the slower speed,i.e 800mhz. So a bit of a waste of money buying the 10066mhz if you mix them. You could use 6GB of 800mhz ram (cheaper option) if your mother board allows it. You need to refer to your mainboard manual to see how much ram it will take and which slots. I assume that you have a decent quad cpu which will also cut down on the editing and encoding time. The ram should speed things up a bit.But how much i'm not sure.