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    Crossflash HPE 640sfp28 to MCX4121A-ACAT

    HAH! @Bulls729, you are amazing, thank you so much!! I just tried to do some exploration with Claude Opus 4.6, and look what it found: ┌───────────────────────┬─────┬────────┐ │ │ HPE │ NVIDIA │ ├───────────────────────┼─────┼────────┤ │ module 0 → local_port │ 1...
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    Enabling PCIe Gen4 on ConnectX-5 EN Cards — Firmware Patch Tool & Full Writeup

    Am I understanding this correctly that you would need to apply the patch (based off of an OEM FW) to every new version of the NVIDIA FW? So you repeat the process as new FW comes out?
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    Crossflash HPE 640sfp28 to MCX4121A-ACAT

    Wow, this is amazing. Thank you for the write up and the inspiration. I will try to at least follow the same approach to understand what could be different between the two firmwares.
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    Crossflash HPE 640sfp28 to MCX4121A-ACAT

    I'm following up on my attempt long ago just to share experiences, in case someone else runs into the same things. I followed the pattern of -allow_psid_change burn to try and move HPE 640SFP28 to the MCX4121A-ACT on a variety of hosts. Everything essentially worked fine on hosts where the HCA...
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    E810-XXVDA4 as a Switch?

    I just saw in the aliexpress listing, the sticker on the back says NETWIRK instead of NETWORK on the product label ... /facepalm. Do you have any details on that? You cut a hole on the top or printed a whole new top cover?
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    E810-XXVDA4 as a Switch?

    Those do look interesting, I didn't see them. Thank you! A bit expensive, consideirng I have a PC for the NIC, but they will prevent any shenanigans later when I decide 4 ports just isn't enough. I wonder if the fans can be swapped with Noctua units to silence them out. Too good to be true...
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    E810-XXVDA4 as a Switch?

    Hello, I have a question regarding trying to setup a 25G backbone in my house (we get 25G internet, that is the only reason I'm trying). I am wondering if it makes sense to use a NIC like the Intel E810-XXVDA4 as a Switch (well, one port would be used for incoming WAN). I would like to have...
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    Crossflash HPE 640sfp28 to MCX4121A-ACAT

    Alright, I was able to save myself. I found the HPE firmware for the card at https://support.hpe.com/connect/s/softwaredetails?language=en_US&collectionId=MTX-5c045315a07d4577&softwareId=MTX_b4c2b59c36ce4642ba7da920d7&tab=revisionHistory and force flashed it back, and after a poweroff and...
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    Crossflash HPE 640sfp28 to MCX4121A-ACAT

    Thanks for the guide. I followed MountainBofh's instructions, which seemed to work fine for my HPE Ethernet 10/25Gb 2-port 640SFP28 Adapter, exact same as theirs. However, now I am wondering why did I mess with a working thing... I broke my router setup because the HCA passthrough broke...
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    Can a Connect-X 4 Negotiate 2.5gb ethernet?

    Thank you both! I've ordered the linked transceiver (10Gtek ASF-10G2-T) from Aliexpress, hopefully works!
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    Can a Connect-X 4 Negotiate 2.5gb ethernet?

    I am wondering if I purchase a copper transceiver for a Connect-X 4 (https://www.fs.com/products/139650.html) set to 2.5gb, is it possible the card will negotiate this rate? I don't see it on the datasheets, but I don't know if the driver perhaps added support after the publications.