You need a HDMI receiver to decode the sound on the HDMI.
Which one are you looking at that is 8xx? Those Hotway Probox? 

The one we are talking about can only be bought in those nicely decorated HP reseller shops. Looks like this;



RM 699 gives you the N36L cube with the AMD Athlon II Neo N36L 2x 1.30GHz cpu (much faster than most Intel Atom cpus) on a AMD RS785E/SB820M chipset, one empty 160GB Seagate 7200rpm drive, 2GB ECC memory (originally comes with 1GB but in this promo, they upgrade to 2GB memory for free), RAID 0 and RAID 1 support from BIOS, loads of USB 2 connectors (2 rear, 4 front, 1 internal), 1x eSATA, 1x gigabit network connection and a DVDROM bundled. It comes with a built-in graphic card (ATI HD 4200, not HDMI though). So you don't need to buy a graphics card to purposely make it work.

The N36L will originally come with the 160GB hardisk in slot 1 of 4. To get 4 pieces of 2TB or 3TB drives to fit in, you need to shift the 160GB drive up where the DVDROM should be located (who needs DVDROm when you have USB thumbdrives...) with the help of a 5.25" to 3.5" bracket. Use the extra SATA cable for the DVDROM and connect the 160GB hardisk to the SATA connector meant for optical drive on motherboard. The 4 slots in the N36L are RAID / AHCI suported. In order to enjoy AHCI support on that SATA connector meant for optical drive so your 160GB would run faster, you can flash a BIOS mod.

This 6xx NAS does not come with OS. It's like a mini PC that you need to install an OS for it to work. Unlike other types of NAS, there is one x16 PCIe slot and one x1 PCIe slot for expansion. It also has 2x DDR3 memory slots for you to upgrade your memory up to 16GB memory. So the possibilities are endless. The x1 PCIe slot you can add USB 3 card or even additional GB network card. The x16 PCIe slot gives you the possibility to add in a low powered HD 6450 card or you can opt for an even more powerful RAID card.

If you look around, there is no other 4 bay NAS as powerful, as configurable and as cheap that has the capacity to fit in 5 drives.

Last time my HP microserver also bought from lowyat Plaza in KL.
In Pg the HP sales person dun even know what you are talking about also.

The one THAT was on the ground floor, but it not there anymore!