---
name: "myx"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/myx"
---

# myx(4)

Myricom Myri-10G PCI Express 10Gb Ethernet device

## NAME

**myx** – Myricom Myri-10G PCI Express 10Gb Ethernet device

## SYNOPSIS

**myx\* at pci?**

## DESCRIPTION

The **myx** driver supports the Myricom Myri-10G PCI Express 10Gb Ethernet adapters based on the Myricom Lanai-Z8E and Lanai-Z8ES chipsets, including the following:

- Myricom 10G-PCIE-8A-C Adapter (10GbaseCX4)

- Myricom 10G-PCIE-8A-R Adapter (10GbaseSR/LR)

- Myricom 10G-PCIE-8A-Q Adapter (10G XAUI)

- Myricom 10G-PCIE2-8B2-2S Adapter (10GbaseSR/LR)

- Myricom 10G-PCIE2-8C2-2S Adapter (10GbaseSR/LR/LRM)

Low profile versions are supported as well.

## FILES

The adapter needs a firmware file, which is selected and loaded on demand by the driver when the device is attached:

- */etc/firmware/myx-eth\_z8e*

  - */etc/firmware/myx-ethp\_z8e*

  ## SEE ALSO

[arp(4)](/arp/4.md), [ifmedia(4)](/ifmedia/4.md), [intro(4)](/intro/4.md), [netintro(4)](/netintro/4.md), [pci(4)](/pci/4.md), [hostname.if(5)](/hostname.if/5.md), [ifconfig(8)](/ifconfig/8.md)

## HISTORY

The **myx** driver first appeared in OpenBSD 4.2.

## AUTHORS

The **myx** driver was written by Reyk Floeter ⟨*reyk@openbsd.org*⟩.

## CAVEATS

While the firmware supports reading module information for [ifconfig(8)](/ifconfig/8.md) **transceiver** to use, it does not support writing to the module. This prevents configuration of the module, which may prevent [ifconfig(8)](/ifconfig/8.md) from reading the right data from the module where other network cards succeed.