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Thanks for the update. In fairness, I will correct my above statement from "selling only fake cards" to "selling mostly fake cards".

My fake card was replaced with another fake card. So even those complaining won't necessarily get the thing they thought they were buying. And I say fake because I think the factory/labeling error theory doesn't line up. Why would there be these obvious solder marks on the U17 chip that stores...

Still haven't removed the first card I received to check which chip I have. But the replacement has arrived today and there are no solder marks on U17 but the chip still reads ConnectX-3 (no Pro in sight). The laser etched markings are barely visible but I can decipher the MT27508A1 on the chip...

This is the same seller I purchased my card from as well. So I'd assume it's a ConnectX-3 (non Pro) as well. Probably best to avoid this seller Let's see if they will simply send me another fake card for the replacement.

Thanks for your reply! That's great that you have an authentic card for comparison. So I have the new card coming in the mail hopefully in a week or two. Once it's there I'll verify what it says and then pull out the other card to do a Scooby-Doo like reveal of who we're dealing with here.

Contacted the seller and they will send a new card. Will report back whether that one comes unmodified.

So just pulled the card out once more and it seems there has been some soldering going on with the U17 I2C EEPROM (top left of heatsink). So I guess this card would be considered "refurbished" but had incorrect VPD programmed. The rest of the card matches very closely what other CX312Bs look...

Thanks for the input. It's much appreciated! @pdatabim, yes this is the firmware I tried flashing. I also downloaded the release that's already running on the card to do some checksumming to confirm it's the same firmware (as seen in my first post). So I managed to take some pictures of the...

I purchased what supposedly is a MCX312B-XCCT from a Chinese eBay seller. When trying to upgrade the firmware (mlxfwmanager --online -u) I get an error message that apparently the hardware ID doesn't match the image: Fail : Device/Image mismatch: FW image file cannot be programmed to device...