Motherboard Features & Thermal Design

The unique nature of the BIS-6922 is evident in the chassis design. While other fanless PCs such as the Aleutia Relia go in for a rectangular design with hard edges and fins to blend in with it, the Habey fanless unit opts for a curved design on either side. The chassis is made to act as a heat sink and the circular metal segments on either side are serrated. This gives more surface area for heat to dissipate compared to the rectangular fins found in other fanless configurations. Habey terms this 'ICE-FIN'. It also delivers a distinctive look to the unit.

The BIS-6922 has no ventilation holes. Even the power button in the front panel is protected by a sealed plastic cap on the rear side of the front panel. This makes the unit almost fully dust-proof. Despite the dust-proof nature, the unit is very easy to take apart. The underside panel is held by only one screw, It provides access to a mini-PCIe and SIM card slot (for 3G / 4G data connectivity).

The ridged top panel can be easily removed to reveal the heat dissipation mechanism. The 2.5" disk drive is mounted on the underside of this top panel. The top panel has a groove on each side which lines up with similar grooves on the sides of the chassis. We have liberal thermal paste applied to copper heat pipes that are placed in the grooves to improve the thermal conductivity between the chassis sides and the top panel.

After disconnecting the SSD wires from the motherboard, it is possible to completely remove the top panel from the main chassis. This enables us to get a better view of the thermal solution and also some interesting motherboard features. These include PCIe / PCI lanes brought out to the edge of the motherboard (which is unfortunately not usable with the BIS-6922's chassis configuration) and an additional mPCIe slot for a Wi-Fi/BT card or mPCIe SSD. An mSATA port is also available. One of the two SODIMM memory modules (Super Talent / DDR3-1333) is also visible (The other one is partially visible after removing the panel on the bottom).

The motherboard is based on the QM77 chipset. This provides various features targeting business, embedded and industrial PC applications including Intel AMT and support for vPro processors amongst other features.

The CPU and PCH are placed on the motherboard in such a way that a single rectangular block of metal covers both of them. The block has two grooves out of which copper heat pipes swathed in thermal paste emerge to make contact with the inner sides of the chassis (one heat pipe to each side). The contact of these heat pipes with the sides is firmed up thanks to another set of smaller metal blocks. Compared to the heat pipes with a liberal number of bends in the Aleutia Relia, the thermal design configuration of the BIS-6922 is very simple and straightforward. Does this design lead to better thermal performance? Before finding that out, let us take a look at the performance numbers and power consumption of the unit.

Introduction Performance Metrics


View All Comments

  • fluxtatic - Saturday, August 17, 2013 - link

    Way overkill - within a couple weeks, I'll be putting a PC in my car - AsRock E350 board with a 128GB Samsung 830 SSD, 7" Lilliput touchscreen in the dash - all told it'll be around a third the price these start at, and won't have any problems serving up music/GPS/radio. And you hardly need dustproof - check or, they have cases specifically intended for car PCs that would still let you build something way cheaper than this. Depending on where you live, it could be a poor choice for another reason - ambient heat could be a problem, and it wouldn't be the easiest thing to ventilate. Reply
  • coolhund - Sunday, August 18, 2013 - link

    Why overkill? If you hang one or two HD cameras onto it, or like 4 SD ones, it will need that kind of power. Not to mention if you use several monitors.

    However, as a Car PC it has FAR too few USB connectors, since USB Hubs are just a huge source for problems. Even for normal use its too few. Even my desktop computer needs at least 9 and I really dont have anything unusual on it.
  • androticus - Saturday, August 17, 2013 - link

    $1500? <plonk!> Reply

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