|  |  | ARK-3520L-U7A1E | ARK-3520L-U8A1E | 
        
            | Processor | CPU | Intel   Core i5-6440EQ | Intel   Core i5-6440EQ | 
        
            | Core Number | 4 | 4 | 
        
            | Frequency | 2.7GHz | 2.8GHz | 
        
            | L3 Cache | 6   MB | 8   MB | 
        
            | Watts | 45W | 45W | 
        
            | Chipset | Intel   QM170 | Intel   QM170 | 
        
            | BIOS | AMI   EFI 128Mbit | AMI   EFI 128Mbit | 
        
            | Memory | Technology | DDR4   2133MHz | DDR4   2133MHz | 
        
            | Max. Capacity | 32   GB | 32   GB | 
        
            | Socket | 2   x 260-pin SO-DIMM | 2   x 260-pin SO-DIMM | 
        
            | Graphics | Chipset | Intel   QM170 Integrated GFX Gen 9 | Intel   QM170 Integrated GFX Gen 9 | 
        
            | Graphic Engine | Direct   x 12, OpenGL 4.4, HW Encode: H.265/HEVC, H.264/MPEG-4 AVC, MPEG-2, JPEG/MJPEG   and VP8, HW Decode: H.265/HEVC, H.264/MPEG-4 AVC, MPEG-2, VC-1/WMV9,   JPEG/MJPEG, VP8 and VP9 | Direct   x 12, OpenGL 4.4, HW Encode: H.265/HEVC, H.264/MPEG-4 AVC, MPEG-2, JPEG/MJPEG   and VP8, HW Decode: H.265/HEVC, H.264/MPEG-4 AVC, MPEG-2, VC-1/WMV9,   JPEG/MJPEG, VP8 and VP9 | 
        
            | VGA | Up   to 1920 x 1200 at 60 Hz | Up   to 1920 x 1200 at 60 Hz | 
        
            | HDMI | 1   HDMI port, HDMI 1.4a for HD video playback, 3840x2160 @30Hz | 1   HDMI port, HDMI 1.4a for HD video playback, 3840x2160 @30Hz | 
        
            | Triple Display | VGA+HDMI   + 3rd display module (DVI-D / DP / 2nd HDMI Display Port) | VGA+HDMI   + 3rd display module (DVI-D / DP / 2nd HDMI Display Port) | 
        
            | Audio | Interface | Realtek   ALC888S, High Definition Audio, Line-out, Mic-in | Realtek   ALC888S, High Definition Audio, Line-out, Mic-in | 
        
            | Ethernet | LAN1 | 10/100/1000   Mbps Intel I219-LM GbE, support Wake On Lan | 10/100/1000   Mbps Intel I219-LM GbE, support Wake On Lan | 
        
            | LAN2 | 10/100/1000   Mbps Intel I210 GbE, support Wake on LAN | 10/100/1000   Mbps Intel I210 GbE, support Wake on LAN | 
        
            | I/O | Serial   Port | 4   x RS-232 ports, 4 x RS-232/422/485 port with auto flow control; COM 1,2   support 5V/12V power supply (by jumper) | 4   x RS-232 ports, 4 x RS-232/422/485 port with auto flow control; COM 1,2   support 5V/12V power supply (by jumper) | 
        
            | USB Interface | 6   x USB 3.0 ports; 2 x USB 2.0 ports | 6   x USB 3.0 ports; 2 x USB 2.0 ports | 
        
            | Digital I/O | 16   bit DIO | 16   bit DIO | 
        
            | PS/2 | 1   port support by option cable and bracket | 1   port support by option cable and bracket | 
        
            | Parallel port | D-sub   25pin connector (Optional) | D-sub   25pin connector (Optional) | 
        
            | Other | Watchdog   Timer | 255   levels timer interval, setup by software | 255   levels timer interval, setup by software | 
        
            | TPM | TPM   2.0 (Optional by project support) | TPM   2.0 (Optional by project support) | 
        
            | Expansion | Slots | AMO-3501E   3 Slot Riser Card for 2x PCI+1xPCIx4 | AMO-3501E   3 Slot Riser Card for 2x PCI+1xPCIx4 | 
        
            | Mini PCIe | 2   x Full-size Mini PCIe (1 x support mSATA, 1 x support SIM holder) | 2   x Full-size Mini PCIe (1 x support mSATA, 1 x support SIM holder) | 
        
            | M.2 | 1   x E key for WiFi | 1   x E key for WiFi | 
        
            | iDoor Module | 1   set (Optional) | 1 set (Optional) | 
        
            | Storage | HDD | 1   x 2.5" SATAIII HDD Bay with Max Height 15mm, (1 internal 2.5" HDD   Bay with one optional removable HDD Bay) | 1   x 2.5" SATAIII HDD Bay with Max Height 15mm, (1 internal 2.5" HDD   Bay with one optional removable HDD Bay) | 
        
            | mSATA | 1x   mSATA socket (Share 1 Mini PCIe) | 1x   mSATA socket (Share 1 Mini PCIe) | 
        
            | Software Support | Microsoft   Windows | Windows   10, Windows 8.1, Windows 7 | Windows   10, Windows 8.1, WES7, Windows 7 | 
        
            | Linux | Support   by project | Support   by project | 
        
            | Power | Power   Type | ATX | ATX | 
        
            | Input Voltage | 12   VDC (9 ~ 36 VDC as option) | 12   VDC (9 ~ 36 VDC as option) | 
        
            | Power Adaptor | AC   to DC, 150W (Optional) | AC   to DC, 150W (Optional) | 
        
            | Consumption | Typical   11.4W, Max. 46.5W | Typical   11.4W, Max. 46.5W | 
        
            | Mechanical | Construction | Aluminum   housing | Aluminum   housing | 
        
            | Mounting | Desk/wall-mounting | Desk/wall-mounting | 
        
            | Dimensions | 220   x 101 x 233 mm (8.66" x 3.98" x 9.17") | 220   x 101 x 233 mm (8.66" x 3.98" x 9.17") | 
        
            | Weight | 4.8   kg (10.58 lb) | 4.8   kg (10.58 lb) | 
        
            | Environment | Operating   Temperature | With   extended temperature peripherals: -20 ~ 60° C (-4 ~ 140° F) with 0.7m/s air   flow With 2.5-inch hard disk 0 ~ 45° C (32 ~ 112° F) with 0.7m/s air flow | With   extended temperature peripherals: -20 ~ 60° C (-4 ~ 140° F) with 0.7m/s air   flow With 2.5-inch hard disk 0 ~ 45° C (32 ~ 112° F) with 0.7m/s air flow | 
        
            | Storage Temperature | -40   ~ 85° C (-40 ~ 185° F) | -40   ~ 85° C (-40 ~ 185° F) | 
        
            | Relative Humidity | 95%   @ 40° C (non-condensing) | 95%   @ 40° C (non-condensing) | 
        
            | Vibration during Operation | With   SSD: 3 Grms, IEC 60068-2-64, random, 5 ~ 500 Hz, 1 hr/axis | With   SSD: 3 Grms, IEC 60068-2-64, random, 5 ~ 500 Hz, 1 hr/axis. | 
        
            | Shock During Operation | With   SSD: 30 G, IEC 60068-2-27, half sine, 11 ms duration | With   SSD: 30 G, IEC 60068-2-27, half sine, 11 ms duration | 
        
            | Regulation | EMC | CE/FCC   Class B, CCC, BSMI | CE/FCC   Class A, CCC, BSMI | 
        
            | Safety | UL,   CCC, BSMI | UL,   CCC, BSMI, CB |