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PCI-E bifurcation, Poweredge 7910 (alien.top)

submitted 11 months ago by uberbewb@alien.top to c/homelab@selfhosted.forum

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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.

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.

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[–] ycdrtt@alien.top 1 points 11 months ago

I have an extra “hyper m.2 x16 card v2” if you want it

[–] Zer0p0int_@alien.top 1 points 11 months ago

That’s a messy hole I went down and with no confirmable configurations I went with SAS SSD in my 7910 vSAN cluster using HBA 330’s. Using winsat in a windows VM to test disk speeds I get: Random 16.0 Read: 310MB/s Sequential 64.0 Read: 2892MB/s Sequential 64.0 Write: 1882MB/s

I’m finding it hard to complain and it was a much less risky solution.