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Product Support

Product FAQs


What should I do when I cannot boot my computer when using a 8-port Moxa serial board with a Rocket Lake CPU?

This issue is seen when users use CP-118E-A-I/138E-A-I Series, CP-118EL-A, or CP-168EL-A multiport serial boards with Rocket Lake CPUs and motherboards and cannot boot their computers. The reason for this issue is that the 8-port-serial cards have a compatibility limitation with the Rocket Lake CPU PCIe slot. The workaround solution is that you can swap this serial card to another PCIe slot.


You can fix this issue by following the steps below.

Step 1. Power off.

Step 2. Unplug the multiport serial board from the PCIe slot that has this issue.

Step 3. Put the multiport serial board in other PCIe slots that do not directly come from the Rocket Lake CPU like the picture below.

Step 4. Boot up the computer.

Note: Serial communication is usually not very high-speed communication, and the users are not necessary to put the serial card to the x16 PCIe slot. PCIe x1.0 slot will be enough.

Relevant Products

CP-118E-A-I/138E-A-I Series · CP-118EL-A · CP-168EL-A ·

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