2400x3000 is only 8x10 I always figured people made them that big how else can you print them. I have 4 gbs of ram. Sometimes it says all the cpu is running, but I will check it when I start a new render I'm so scared to do anything until this one is done I don't want to lock it up. It's now going on over 11 hours:( It never used to take that long. Even my laptop will render certain 8x10s with occlusion (my laptop is broken now though but it did) though this file I guess was too much for it, but still when it did work it maybe would take 3 hours or something, not all day...