@allan
You have right, a Mini-ITX PC is very heavy and makes some noise, if it has fans.

@sebastian
Yes, it is also a possible solution. It is very similar to the idea of this HD-PLEX case with passive cooling, maybe he customized it.
For me the layout isn't good, it's too flat.

Off-topic for Mini-ITX but...

This was my topic starting post:
"I have an idea about to build a portable Mini-ITX multifunctional PC, which could get the big amount of RAW data from the Beta, store it on HDD + maybe it could work as a system which could process/encode the files and as a workstation too.

RAW recording means RAW, so there isn't any compression, debayering, etc. just get directly the RAW data from the sensor and save it. It is very good from the point of dataamount, because there isn't any information about the color of the pixels. Let's count:

The EQCO62X20 chipset is a driver/equalizer chipset that forms a bidirectional, full-duplex communication link over a single coax cable. It is designed to transport up to 6.25 Gbps over the downlink channel and to transport 21 Mbps over the uplink channel.