Hmdi port 2 into hdmi at the back of the ps3.
It sucks because the blacks aren't as deep and the picture isn't as sharp. Lights would twinkle and you'd be sucked into to the movie immediately with the other one. The ps3 has a tiny bit of grain in scenes, especially dark ones.
My fiancee can only slightly tell apparently, perhaps because I pointed it out to her, but to me it sticks out like a sore thumb and makes me a sad sad man
