I’ve planned to do ram upgrade for a while now, but today I saw prices on new egg doubled for corsair’s memory. So I ordered corsair ddr2 800 2x1gig for $130 with $30 rebate on zoomfly. I already have 2x512mb sticks on my system with room for two more. I read on forums that installing 3 gigs is not recommended and it's better to have 2gigs instead. Should I cancel my order and get 2x512 sticks for $75 instead? My main concern is will they work in dual channel? I’m planning to do some editing/photoshop and gaming.