I have a little Proxmox home lab going on and for my #100DaysOfHomeLab today I would like to better understand the various ConnectX-3 cards.
Is there a preferred one for home use? The boundaries are SFP+ and 10gig.
Already ordered one from eBay, an CX311A variant. I wanted a dual port card, but was not liking the prices and I was already browsing for days, so I just picked one to get stuff rolling.
I found an Nvidia spec document for these cards, and it gives details for
- MCX311A-XCAT, 1 port
- MXC312A-XCBT, 2 port
- MCX312B-XCBT, 2 port
The first one is straight forward, single port. How does the other two differ from each other? I can see they have different dimensions and use different components, but is one better than the other?
I also see some different model numbers, like CX322A, which google tells me is a Dell branded card. Are re-brands safe to buy? Or Dell will only work in Dell, Lenovo in Lenovo, etc.
I also saw ConnectX-2 cards being sold for a lot cheaper. I think those were made for PCIe 2.0. Is that something to consider for a home lab? My main concerns are power draw and heat generated, speed not so much.