Can I connect my PC to the HDMI arc port on my sound bar?
No, you cannot attach the HDMI port on your laptop to the HDMI-ARC port on your soundbar, but if your soundbar has an hdmi input connector, you can use that port with your laptop’s HDMI output connector.An HDMI port is either a Transmitter or a Receiver port. Your PC has an HDMI Transmitter and your soundbar’s HDMI-ARC port is also an HDMI Transmitter, so those ports should not be connected to each other. However, if your soundbar has an HDMI Input (Receiver) port, you can attach your PC to that port and you should be able to play music.The ARC feature of HDMI lets a TV send audio backwards through an HDMI cable, but it still requires a connection of an HDMI Transmitter (soundbar) to an HDMI Receiver (tv set).
Computer build compatibility question HTPC & Multi Monitor Gaming?
To drive six !!!! monitors you're probably going to need three video cards. And they're going to have to be powerful, especially for that 30-inch display. Every year Maximum PC magazine builds the hottest machine they can and the 2011 model can probably do what you want. They dropped over $12,000 on it, but a lot of the stuff you aleady have or don't need. For example, they spent $6900 on three monitors, but you already have that. And who needs a $120 mouse? Anyway, here's the article; I'm sure it will give you plenty of ideas.