10Gtek 10GBase-SR SFP+ Transceiver, 10G 850nm MMF, up to 300 Meters, Compatible with Intel E10GSFPSR, Pack of 2

This review is for the model "10GTEK 10GBase-SR SFP+ Transceiver, 10G 850nm MMF, up to 300 Meters, Compatible with Intel E10GSFPSR". The product worked flawlessly with a Dell X520-DA2 0C63DV that has the 82599ES chip on it. I had used another 10gtek SFP out of my collection, but it would cause the interface to disappear. This module had zero issues, and is quick and easy to install.

I bought these for my Dell PowerEdge R630, which has an embedded X520/I350 network card with dual 1G Ethernet ports and dual 10G SPF+ slots (Intel 82599ES controller).I have bought many, many 10Gtek SFP+ transceivers over the past several years (primarily for MikroTik devices), and I have never had a single problem with them.However, this is the first time that I bought a pair of these that came in a nifty little tin. Completely unnecessary, but a nice touch nonetheless! The insides are removable, so you can use the tin for anything you want. Neat!

Had a generic Fiberstore SFP+ that didn't work in my Intel X520-2P NIC, but this one does. Bonus that this was a better deal and it comes in a neat little metal box.

I took a chance and got the Intel compatible SKU. To my surprise, I was able to use this SFP optic in with the overly-picky Intel x520 10gx2 NICs without issue. I had been previously limited to DACs, so this was a welcome result. Would recommend highly, especially for the price.

Absolutely did the trick between an intel based 10Gtek NIC and a Netgear managed switch!

I bought a 10 gig network card and cable from them. Unfortunately I bought the wrong cable and couldn't maintain a connection for more than a few seconds once a minute. Thanking it was a driver issue I contacted the seller. They asked me for the information on my equipment after getting this information they replied back in a very short time letting me know that due to the type of switch I had that I had bought the wrong cable. They gave me links to the correct parts I needed. I ordered the correct parts which ended up cheaper than the cable that they graciously refunded me for. If you need networking components go with 10Gtek and ask before you buy if your not sure what to get.

--- Update 12.17.2018---I had a pleasant and very professional conversation with 10Gtek. They immediately offered me a full refund. Their engineering team managed to replicate the problem and are currently investigating. Once the problem is fixed I will update the overall rating to 5 stars.--- Review ---I am having a strange problem with these transceivers and I have no explanation. If you have any idea please share.I have two computers directly connected with these transceivers via 1m fiber cable.Computer "A" is Dell Precision workstation with Intel X520-DA2Computer "B" is Supermicro X9DR7 with Intel X520-DA2Every time "B" gets restarted or powered on, the audio on computer "A" stutters for 1 second and at the same time the picture freezes. It is the most noticeable when watching youtube videos. This happens a second or two after you press the power button on computer "B" - in other words it has nothing to do with the OS on computer "B". On "B" I am running XenServer and I am passing through X520-DA2 to one of the VMs. The moment I power on this particular VM the problem appears again - the sound stutters and the picture freezes for a second on computer "A". I did dozens of restarts and power ons/offs and got really frustrated. The moment I unplug the fiber cable from the transceiver and there is no stutter. I don't even have to unplug the transceiver from the network card. The moment I plug the fiber cable back in and the problem returns. Although the 10Gb communication works between both computers and although I will not be restarting the server very often, the stuttering audio and frozen picture is unacceptable for me.After a month I decided to see what will happen if I use Passive Direct Attach Copper cable. Got one from the same seller (10Gtek) and same length - 1m. And to my surprise I no longer can reproduce the issue. It looks like the DAC cable solves my problem. The question is why?Unfortunately I cannot return the transceivers since one month has already passed.I will gladly update the review and the rating if someone gives me an explanation and a solution.

I have used these in several older Dell Servers and they were easy to install and setup, and work perfectly. I added several of these to connect to a Ubiquiti 10gig aggregation switch and everything communicated with each other without issue and at the speeds expected.Also I have used products from Gtek multiple times now and everything has been smooth and simple.