Both are Advantech carrier boards in the same MIB-740 product line, both compatible with Jetson AGX Thor modules (T5000 128GB / T4000 64GB), so your choice comes down to connectivity and mechanics. advantech... +1advantech.com ↗“Advantech Jetson T5000/T4000 developer board kit”advantech.com ↗“Advantech Jetson T5000/T4000 AI inference SBC”
Comparison on your three attributes
| Attribute | MIB-741-AT | MIB-742-AT |
|---|---|---|
| Ethernet ports | 4 RJ45 + 1 SFP28 (25GbE) | 1 RJ45 (5GbE) + QSFP28 |
| USB ports | 8 external connectors | 6 external connectors |
| Weight | 1300 g | 1000 g |
advantech... +7advantech.com ↗“io.ethernet_ports=4”advantech.com ↗“Four RJ45 ports, one 25GbE SFP28 port”advantech.com ↗“io.usb_ports=8”advantech.com ↗“mechanical.weight_g=1300 g”advantech.com ↗“io.ethernet_ports=1”advantech.com ↗“one 5GbE RJ45 port, QSFP28 networking”advantech.com ↗“io.usb_ports=6”advantech.com ↗“mechanical.weight_g=1000 g”
What this means for your AMR
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MIB-741-AT — 4x RJ45 gives you multiple wired Ethernet links directly on the board (e.g., separate networks for sensors, motor controllers, and uplink) without adding an external switch, plus 8 USB connectors including recovery and debug. It mounts as a desktop unit. advantech... +2advantech.com ↗“Four RJ45 ports, one 25GbE SFP28 port and optional eight-channel GMSL”advantech.com ↗“Eight external USB connectors include recovery and debug”advantech.com ↗“mechanical.mounting_type=Desktop”
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MIB-742-AT — lighter by 300 g with a single 5GbE RJ45 plus QSFP28 for high-bandwidth fiber networking, 6 USB connectors including recovery and debug, and wall-mount design. advantech... +1advantech.com ↗“one 5GbE RJ45 port, QSFP28 networking and six external USB connectors including recovery and debug”advantech.com ↗“mechanical.mounting_type=Wall mount”
Note that both boards' −10 to 60 °C operating range requires 0.7 m/s airflow, so plan enclosure ventilation either way. advantech... +1advantech.com ↗“Operation from −10 to 60°C requires 0.7m/s airflow”advantech.com ↗“thermal.operating_temp_condition=Requires airflow”
Bottom line
- If your AMR needs multiple wired Ethernet links and maximum USB connectivity, pick the MIB-741-AT (4x RJ45, 8 USB) at 1300 g.
- If weight and space are the priority and a single 5GbE copper link plus QSFP28 uplink is enough, the MIB-742-AT saves 300 g and is wall-mountable.
Both support the same Thor compute ceiling (1035 sparse INT8 TOPS / 2070 FP4 TFLOPS from the supported T5000 module), 19–36 V power input, and optional GMSL and 5G — so neither compromises on the AI compute your AMR needs. advantech... +3advantech.com ↗“1035 sparse INT8 TOPS from the supported T5000 module”advantech.com ↗“manufacturer-published 2070 FP4 TFLOPS”advantech.com ↗“1035 TOPS”advantech.com ↗“GMSL and 5G are optional”