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have you tried doing all this in a linux live disk?

what version of mst did you install? only the v4.25 (and older) of mst worked for cx3 cards on my system.

Yup, you got the right idea. I'd probably still get outdoor rated cables since the conduit will likely get flooded over time, and I'm not sure how well would the indoor rated cables hold up.

set a lower interface metric for your 40Gig interfaces vs the 10Gig ones (2 for 40GbE vs 5 for 10GbE) Create entries in the host files for each machine. Traffic for those 3 machines should flow out of the interface with lower interface metric. You can also setup static routes on windows...

I strongly recommend a conduit so you can pull cables in the future. You're already there doing most of the labour anyway, cost of conduit shouldn't be a big part of this.

lol. I digress; SR-IOV doesn't even work with the native mlx4 drivers on esxi6.7/7 despite working on the old linux based drivers. The writing was long on the wall for CX3 era of cards, especially if you're working with vSphere.

there is indeed an OEM tools option if you go under advanced install.

If telling you "a car won't fly like a plane" is considered "unhelpful", then I guess they should all just move on and leave you to your own devices. and didn't fohdeesha linked you a 40GbE cx4 for 90 bucks in the same post you quoted? Not as good as $15/card but it's definitely ahead of...

PON is not the same as regular active ethernet, the ONT needs to be authenticated by the OLT before things starts going. From what OP has described, he have a working relationship with the techs behind the scenes so it wouldn't be too difficult for him to get a compatible SFP ONT module (check...

SC/APC usually mean a PON network. You'd need a SFP ONT, a regular bidi optic won't work.

I still have a preference for Mellanox NICs, but I'd suggest you stick to Mellanox branded cards instead.

The SERDES mapping in my previous post was from a ConnectX-3 MCX354A, so I can't say for certain it will be that same mapping for the CX-3 Pro. I'd flash the stock mellanox firmware, dump the config for the mellanox firmware and compare both firmware config files for differences. If the logic...

I think your card might have a non standard logic lane to SERDES mapping as compared to the stock mellanox card. Dump the original HP firmware config and post the logic lane to Serdes mapping flint -d mt4099_pciconf0 dc orig_firmware.ini It looks something like this: ;;Logic lane to Serdes...

Something tells me they don't consider drives as defective even if they have a few relocated sectors and wouldn't mind sending them to you, especially if you just hit buy without talking to them... But at least it sounds like they are not resetting the SMART info. personally, that's a...

Sounds like some arbitrary number, how do you even quantify 100% health on a used/reconditioned hard drive? A clean SMART report doesn't mean the drive won't fail tomorrow, and in this specific scenario, does the health fall from 100% to 0% in an instant upon failure? Some questions that you...

PCIe 4 M.2 to PCIe adapters may work for your use case as well. You can probably crossflash the cheaper MCX512A-ACAT to the MCX512A-ADAT. There's plenty of threads on this board detailing the crossflashing steps.

Ya, but those aren't PCIe gen 4. I presume PCIe gen 4/5 is OP's hard requirement.

SFP28 ports are backward compatible with SFP+ You're looking at E810 for Intel and ConnectX-5 Ex for Mellanox. The big boys (Intel/Mellanox/Chelsio) isn't going to put PCIe4/5 on a 10Gig card because they don't need it.

what happens if you swap the position for both cards? If the temps stay the same, it might be the card being wonky...

In that case I wouldn't be surprised to learn it's attached to one of the CPU's x4 port instead of the chipset, since one of the supposed CPU NVMe slot is gen 3 instead of 4.