monitor(has DVI-D (HDCP) Input)
HDMI/ DVI-D (HDCP) cable
If you want hear voices you need:
cable thats other head goes to your speakers and other head to R and L audio of you'r RCA cable
Okay now place you'r HDMI and RCA cables to you'r PS3. Then place the other head of HDMI cable to your monitors DVI-D (HDCP) input. remember keep monitor and PS3 off.
Now place you'r RCA cables other head to your speakers. Now go pack to your ps3 and go to settings--->Sound settings-->First in the list-->audio input