# Connectx-8 aux cable

**URL:** <https://forums.developer.nvidia.com/t/connectx-8-aux-cable/333556>\
**Category:** Ethernet Adapter Cards\
**Created:** [May 17, 2025, 2:58am UTC](https://forums.developer.nvidia.com/t/connectx-8-aux-cable/333556 "2025-05-17T02:58:52Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jp127](https://developer.download.nvidia.com/images/forums/profile-default-devtalk-84.png) [@jp127](https://forums.developer.nvidia.com/u/jp127)\
**Post date:** [May 17, 2025, 2:58am UTC](https://forums.developer.nvidia.com/t/connectx-8-aux-cable/333556/1 "2025-05-17T02:58:52Z")

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does anyone know where I can find the cable that connects to the rear of the cx8 and then connects into 2 of the MCIO x8 connectors on the motherboard?  
I am receiving the cx8 nic soon but need to have it run at 800Gbps. in a pci gen5 server, I need to use this auxiliary cable or kit. Lenovo sells the cable but it is backordered. Nvidia sell as kit but that is backordered as well. Is there a generic cable that might work? ex. MCIO x16 to 2 x MCIO x8. I purchased one of these cables but it looks like the notch in the cx8 end does not line up with the cable.