Introduction Heard about these Nano-ITX boards? These mainboards sure will set the record for the relative largest heatsink ever on a computer mainboard... To bad that this massive heatsink eliminates any chance for a real small computer if you don't want to do without a harddrive. However, that is no reason not to try, so here we go. Power supply In the past we had the E311 Mini-TX Car power supply. This power supply is not the most suitable for the Nano-ITX boards due to lack of power on the 3V3 rail. Therefore we designed a new power supply, dedicated for the Nano-ITX (but also usable for Mini-ITX with Nano->ATX adapter cable). This power supply is some 50% smaller in volume than the E311 and provides ample current on 3V3 and 5V rails. Prototyping Step 4 - never mind Most likely, this system will never get finished. Because we have started with V4 soon after completion of the Nano power supply. Considering the size and possibilities of that system, it doesn't make much sense to continue building this one. Step 3 - harddisk Harddisk is mounted on standoffs above power supply. The standoffs are a bit longer than necesary at first glance. However, it was the idea to develop a tuner board, which could be mounted between the power supply and the harddisk (hence the stacked standoffs). Step 2 - power supply Prototype of the E313 Nano-ITX power supply board mounted. Although the formfactor of the power supply permits mounting against a case panel with the power connector facing outwards, this case does not permit that easily because the corners of the cover are massive aluminum. So we choose to use a small extenstion cable instead. Step 1 - mainboard Here we have the fanless Nano-ITX mounted on the base of our case. The case will be pretty simple with a plain large hole allowing access to the mainboard connectors. The audio connections will be made with right-angle jack cables to panel-mount RCA sockets (mountd on the cover). The edge of the case cover will secure the RCAs in place.