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Fanless 3.5-inch SBC runs Linux on dual-core Bay Trail

Oct 29, 2015 — by Rob Reilly 925 views

Axiomtek’s fanless “CAPA848” SBC runs Linux on an Intel Bay Trail Celeron N2807 processor, and offers up to 8GB of onboard RAM and -20 to 70°C operation.

Like a number of other 146 x 104mm, “3.5-inch form factor” single board computers, the Axiomtek CAPA848 supports a dual-core 1.58GHz Intel Celeron processor of the Bay Trail generation. It appears to be a slightly less populated board, using the same fab as the CAPA841, which we covered last year, but with a different processor (see comparison photos farther below). Other Bay Trail-based 3.5-inch SBCs we’ve covered include Nexcom’s EBC 355, ADL’s ADLE3800HD, the WinSystems SBC35-CC405, Aaeon’s GENE-BT06, and Axiomtek’s own CAPA840.

(click image to enlarge)

Axiomtek’s CAPA848 SBC equips its Celeron N2807 with up to 8GB of DDR3L-1333 SODIMM RAM. There is a single SATA-300 connector on the board edge, for hooking to storage. The SBC has two mini-PCIe sockets on its bottom surface: a full-sized slot with mSATA support, and a half-sized slot. There’s also a standard-sized SIM slot to support mini-PCIe cellular cards.

CAPA848 top (left) and bottom views
(click images to enlarge)

The board has a single Gigabit Ethernet port that provides Wake-on-LAN and RPL/PXE boot capability. The single network, VGA/LVDS/HDMI video ports, Intel HD chipset, and lower-power processor, suggest applications such as service as a mobile DVR or in digital signage.

CAPA848 top (left) and bottom details
(click images to enlarge)

There are also four serial ports — two supporting RS-232/422/485 and two RS-232 only — as well as four USB 2.0 ports. Audio is handled by a mic-in/line-in/line-out connector, with its output fed by a Realtek ALC662 5.1 channel high definition codec. The board’s Intel HD Graphics controller supports dual simultaneous display operation. There are eight channels of digital I/O available and an SMBus connector for advanced monitoring and control.

CAPA848 (left) compared to more fully populated CAPA841
(click images to enlarge)

The CAPA848 operates from a single 12-Volt supply, connected through a sturdy, topside 2×2-pin connector. The board’s design includes an “AT auto power on” function.

Specifications for the AVI-QM97V1FL include:


  • Processor — Intel Celeron N2807 dual-core processor (Bay Trail) @ 1.58GHz; integrated Intel HD Graphics
  • Memory — 1x SODIMM, for uip to 8GB of DDR3L-1333 SDRAM
  • Storage — 1x SATA-300 interface
  • Display interfaces:
    • LVDS
    • VGA
    • HDMI
  • Networking — 1x Gigabit Ethernet port with Wake-on-LAN and PXE boot
  • Other I/O:
    • 4x USB 2.0 ports
    • 2x RS232 ports
    • 2x RS232/RS422/RS485 ports
    • Audio in/out
  • Expansion:
    • 1x full-size mini-PCIe socket with mSATA support
    • 1x half-size mini-PCIe socket
    • 1x SIM slot
  • Other features — watchdog timer, H/W monitor
  • Power — 12V DC via 2×2 connector
  • Dimensions — 146 x 104mm; “3.5-inch SBC” form-factor
  • Operating system — Linux ( kernel), Windows Vista

Further information

The AVI-QM97V1FL appears to be available now, at an unlisted price. More details may be found at Axiomtek’s CAPA848 product page.

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