I think slot 4 supports this, what I’d like to double check is if I buy the quad card will it automatically recognize only 2 slots being used and switch to x8/x8?
I’m not seeing a whole lot of documentation on this for the 7910.

I am having trouble finding the dual slot card anywhere, but ebay.

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Alternatively, does anyone have theStartech m.2 nvme dual slot card? This one has it’s own chipset, so isn’t relying on the motherboard. I haven’t managed to find if it will truly run the cards to their actual performance.
I primarily want the maximum IOPS as this is a VM server.