Wiitek 10Gb SFP+ to RJ45 Modules, 1.25G/2.5G/5G/10GBase-T Ethernet to SFP+ Transceiver Compatible for Cisco SFP-10G-T-X, Ubiquiti, Netgear AXM766, Mikrotik S+RJ10, Unifi (Cat 6a/7 or Better, 30-Meter)

I had two mikrotik routers using the mikrotik SFP+ to RJ45 transceiver and the routers would get loud with the fans at 100% almost all the time. I looked for a lower voltage, therefor temperature, transceiver. This device popped up in my searches. So far, it does 10GB fine, and my fan noise has gone way down. Fans only go to low or medium at the most and the temperature of the device is lower. 10GB RJ45 Ethernet with lower power, works great. Slid in the SFP+ ports iwth no issues and the Cat6 fit fine on the other end.

Works well in my Mikrotik switches. I specifically bought this brand/model because it is one of the lowest powered SFP+ Copper modules. Why does this matter? Because I’m using it in a passively cooled Mikrotik switch. I get the full 10 Gbps speeds from this doing network tests.

Easy to install and use. It does run a little hot, but I keep the switch well-ventilated so I haven't had a problem.

preface: it works fine at 10GBASE-T, but if you plan to use this at 2.5 read on. the one star rating reflects my desire to bring this review to the attention of prospective purchasers, not a complete condemnation of the product.WiiTek says this supports 2.5GBASE-T and it does autonegotiate to that speed. In some configurations it does deliver the expected performance of 2+ gigabit/s. However if you want to use this in a mixed network with 10 gig or faster you will likely encounter problems. I strongly suspect this is because the switch sees this module as 10 gigabit and sends packets at that speed, resulting in many lost packets and, in my testing, less than gigabit performance.I attempted to work around this with a Mikrotik CRS305 switch by putting egress limits on the port, and that does help. In this configuration I was able to get up to about 1.4 gigabit/s. Raising the egress limit above that resulted in performance collapsing back down to <1 gigabit.I strongly suspect the best way to work around this is to use something like the (much more expensive) Aquantia multi-gig SFP+, and I strongly suspect that's because that module contains effectively a mini ethernet switch capable of buffering and transmitting pause frames. I am not going to bother with this so I don 't know for sure; for me it's cheaper and easier to just get a 2.5 gigabit unmanaged switch.The configuration where it works absolutely fine is when you have multiple of these modules on the same switch all connected at 2.5 gigabit. In that case the packets are naturally limited to the same speed.To summarize, this module is not usable at 2.5 gigabit even though it can autonegotiate 2.5GBASE-T. If you want to use it at 10GBASE-T disregard this post, I haven't seen any problems with 10gig.

I got this for my ubiquiti Dream Machine. It allowed the fastest connection possible and was a simple plug and play solution. Used every day for over a year and no issues with it. Recommended considering the price! Other options would have required me to change my configuration and or buy $1000's of new equipment. It plugs into the device perfectly, and doesn't have any issues.

I bought three different SFP+ modules for testing.- The Mikrotik S+RJ10 Transceiver- 10GTek Transceiver- This one.My use case for this is to connect my Dream Machine Pro to the uncommon 5Gbps gateway port provided by AT&T fiber. The 10GTek doesn't have autonegotiating so it didn't work.The Mikrotik worked. However it was running a bit too hot (85C-ish) and it's close to being dangerous touching. I bought a SFP+ cage to SFP+ cable and the Mikrotik didn't work in the extension cable. That made cooling it outside of the UDM Pro infeasible.Until I discovered this module. Autonegotiation works. Running much cooler at 58C (it is copper gear so this more than just meets the expectations). And it works in the extension cage as well. And guess what? Cheaper than the Mikrotik too.

This transceiver worked well for me for 10G ethernet. I used it in my Ubiquiti UniFi Switch Enterprise's SFP+ port, connected at the workstation end to an AQC107-based 10G NIC. My (unscientific) iperf testing showed Tx/Rx rates in the 7-9 Gb/s range. It also displayed power and temperature info in the switch's UI (which not all of these transceivers do).However, as others have noted in their reviews here: If you're looking for a <10G transceiver, your success with this one may be hit-or-miss. At least on my UniFi switch, when negotiating below 10GBASE-T speeds I consistently saw receive throughput at around 60% of what it should have been (though transmit throughput seemed unaffected). I observed the same behavior when testing various 1Gb and 2.5Gb USB ethernet adapters. I don't know if this could have been fixed with a settings change somewhere or if it is just unique to certain switches, but since the manufacturer advertises IEEE 802.3bz/NBASE-T support I expected it to just work at full speeds.In summary: I'd recommend this transceiver if you want it only for 10G, but if you need to negotiate at anything lower than 10GBASE-T you may encounter lower than expected receive throughput depending on your particular setup.