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Your card is a CX3 Pro, firmware I linked to is for CX3 so that is a dead end.

You can try one of my firmware concoctions: https://forums.servethehome.com/index.php?threads/borked-flash-of-a-mellanox-cx354a-connectx-3-missing-second-port.37878/#post-352220 If that isn't it, I am out of ideas.

You just hate Linux, do you. ;)

Loopback failure on switch which really eats almost anything points to dead cable or dead or blind transceiver. Check out ethtool -m and Monitoring Interfaces and Transceivers Using ethtool | Cumulus Linux 4.0 If you are lucky it will tell you what is wrong on Linux.

Also don't use Windows, get a recent Linux ISO for techies (Kali LinuxRescue etc.) put on USB drive prepared with Ventoy and check ethtool if transceivers show up at all. Some older transceivers get very hot and need good cooling, Mellanox original firmware doesn't care, maybe HP got too many...

Check https://forums.servethehome.com/index.php?threads/anyone-flashing-mellanox-connectx-3-in-qty.16298/#post-155767 by @Marsh Those links from 7 years ago might be dead though. If Google finds nothing, try Yandex or archive.org.

Check https://forums.servethehome.com/index.php?threads/hp-vs-mellanox-firmware.43010/#post-409361 by @klui Also don't look into the laser, invisible.

Own mail server (Arch with postfix, rspamd with redis, dovecot with flattenthecurve full-text search, slightly patched roundcube behind app firewall with deep 1990s PGP compatibility and postgresql, nginx, clamav plus extra patterns, olefy, fail2ban) in a clean subnet of a hoster that throws...

Datasheet like here https://www.eurostor.com/wp-content/uploads/datenblaetter/DataSheet_3400Series_IEA.pdf says 100/1000/10000 only. For 2.5/5 really get an X550. Asus XG-C100C with AQC107 chip is only stable with various features disabled through ethtool. Better yet, get a CX3 that can do...

1 - Looks like they made a new chip for PCIe 3.0 but those seem limited to cards which carry the QLogic brand in silkscreen on front and explicit "PCIe 3.0" in silkscreen on back. Highly doubt the hardware function blocks are magically upgraded from 2.0 to 3.0. It just so happens that the...

Sure, jump on https://www.micron.com/search-results/firmware search for your firmware by just entering 5100, if necessary click "Register". Apparently Github account or Microsoft account is enough by now, no need to register with Micron.com itself. 5100 MAX latest firmware is probably...

Try sniping for Samsung SM883 (liberated firmware) or Micron 5100/5200/5300 MAX (firmware with registration) on ebay.

Yes, you change the PCI subsystem device number for dev 1 and dev 2 (the two ports on the card) and then flash firmware from QLogic after a power cycle. Make sure the card looks about the same, i.e. RJ45 or SFP+ the same, no fan or fan the same. Make a note of all actions and previous firmware...

If you have and reconfigure a BCM57810S card to QLogic QLE3442-CU-CK 14e4:168e 14e4:5006, you can use their firmware and drivers: Public Driver Downloads | QLogic Fibre Channel HBAs and FastLinQ Ethernet adapters and controllers - Marvell -> Category Intelligent Ethernet Adapters / Platform...

Forgot to mention how to restore, e.g. to a new disk: tar --xattrs --xattrs-include='*' --acls -xvjpf backup.tar.bz2 -C /mnt/newdisk If this is supposed to boot, you have to restore the boot configuration of course. With Grub some grub-install and grub-mkconfig, with UEFI and systemd-boot some...

Used StorageCraft ShadowProtect for Windows up until 3.5/4.0 days in places. It's been a while. Acronis has sadly also gone to sjit. Guess all those new developers had to prove their salary somehow some way so they blew up the code base a 100 fold and nobody stopped them. Scripted Drive Snapshot...

Disable each core + it's hyperthread sibling one by one, see if problem goes away. I have written a howto https://forums.servethehome.com/index.php?resources/machine-check-exception-mce-workaround.55/ should also work for AMD. Memtest86 has a blacklist with faulty non-multiprocessor capable UEFI...

85 for 1/1, Switzerland? Doing the same but on Arch. Highly custom and full customizability with iptables and ebtables (old school), like NAT'ing outgoing port 25 SMTP via an external IP in a datacenter so mail delivery is working nicely. I suspect he wants a GUI solution though. For 1 Gbit/s...

The reason why most people get away with non-ECC is that the window for truly critical writes of data from RAM to disk is tiny. Consider RAM bit-flips from decaying atoms within chip packagaging or super-fast cosmic ions from outer space. If you run DDR5, structures within the chip are so tiny...

@RolloZ170 What CPU families are affected by this lag issue?