H!Fiber.com SFP+ Cable, 10G SFP+ DAC, 3M(9.8ft), Passive Direct Attach Copper Twinax Cable for Intel XDACBL3M, Ubiquiti UniFi UC-DAC-SFP+, Mikrotik, Fortinet, Netgear and More, AWG26

Worked great for about 3 months, then I started getting lag and dropped packets increasing in frequency every day. Was using it between a Unifi Dream Machine Pro and a Unifi managed switch and after about 3.5 months the devices couldn't see each other most of the day through this cable.

I purchased this to use with an Intel X710-DA2 (Dell G54KD, dated 05/2021) in a Debian 13 test system before deploying to Proxmox/pfSense. Setup: • Intel X710-DA2 (i40e driver, firmware 8.40) • Ubiquiti Flex 2.5G PoE switch with 10G SFP+ uplink • 0.5m passive DAC Results: The cable was accepted immediately by the X710 with no firmware flashing or modification required. Both ports negotiated cleanly at 10G full duplex. ethtool reports 10000Mb/s and link stability has been solid. I also tested a loopback between both ports on the X710 using this DAC and both sides linked at 10G instantly. No compatibility warnings, no unsupported module messages, no negotiation issues. If you’re running an Intel X710 and worried about vendor coding drama, this DAC worked perfectly in my case without touching firmware. Also worked between two Ubiquiti Flex 2.5G switches!

Pude conectarlo entre un router TP Link ER8411 y un Switch genérico, ambos compatibles con SFP+ y teniendo una velocidad de 10Gbps

I used 10Gbit Passive DAC cables, direct from a switch to two two servers over 10Gbit, works well. Passive cables keeps the heat down as there are no SFP+ modules to power. The switch iteself gets warm to the touch, but not hot, it has no fan, so using these cables help. Switch is a Zyxel XMG1915-10E, servers are MinisForum MS-01.

I’m using this cable between my QNAP NAS and a switch, and it was recognized immediately. All devices report the link as 10Gb, and the connection has been stable with no drops or errors. I’m including a photo showing the interface registering at 10Gb. The 1-meter length was exactly what I needed for a short connection between devices. It keeps things clean without extra slack, and the cable itself feels solid and well made. I don’t currently have another device that can fully take advantage of 10Gb speeds, so I haven’t been able to do real-world throughput testing yet. That said, everything detects the cable correctly, negotiates at full speed, and behaves the way a proper SFP+ DAC should. One thing to note is that the connectors fit very tightly. Unplugging it takes some effort, and the release tab feels stiff enough that I’m careful when removing it. It hasn’t caused any issues, just something to be aware of. For a short SFP+ connection where you want something that’s recognized correctly and works without configuration, this cable has done what I needed so far and leaves room for future upgrades.