OPEN BOX - Qnap Thunderbolt 3 To 10GbE Adapter QNA-T310G1T

After updating MTU on the pc and on the switch to 9000, still couldn’t get 10 Gb/s speed, so stuck with my 2.5Gb ethernet

I got the sfp+ version as it can give me more flexibility to choose different transceiver modules. I've tried DAC, FIber LC, and 10gbe, they all performed very well and stable. I got 700MB/s write and 1gb/s read. The device does generate heat, but it is in acceptable level. One thing I want to point out is the device does work with 2.5gb port with RJ45 transceiver. I got a stable 2.5gb connection. I think it is totally depends on the transceiver compatibility where the device is capable to run 10gb max connection.

I bought the fanless SFP+ system. I was getting 6.4Gbps file transfers without jumbo frames and 9.0Gbps with an MTU of 9k while copying a 2.9GB file from my NAS to by HP Eliitebook 850 G8 laptop just as a quick test. This is not the intended system and I will do actual testing with iPerf when I get it implemented but getting 9.0Gbps with a simple file transfer does not leave much room for improvement. Runs hot! My actual deployment will be DAC and should not have any issues. I noticed it makes a 10Gb-Base-T transceiver run very hot--enough to burn a finger if you hold it for 10 seconds. It might shorten the transceiver life. None of my other switches do this--they get warm but not hot. I would use it only with DAC (or possibly fiber). Update: I've been running this with a DAC cable for some find and it runs quite cool.

Got the SFP+ version of the adapter (QNA-T310G1S). This was a pre-loved (used) unit that really looked like new. I’m working from a Windows 11 machine connected to a Netgear MS510TX switch via 10GbE SFP+ twinaxial direct attach cable. After I plugging the adapter, windows 11 recognized it right away and installed its driver. The next step was to download and upgrade the device to its latest Marvell firmware. The upgraded completed very quickly. Now it's running 3.1.121 firmware. After a final reboot, I was back on business. Note that the Windows PC already Thunderbolt enables, had latest thunderbolt firmware and drivers. I have several VirtualBox Virtual Machines hosted in a Synologic NAS. So I wanted to increase the connection speed to the NAS. To test my setup, I started a VM running Lubuntu 22.04 LTS and started a job to build Linux Kernel 6.1.4 with some custom teaks. The process started and ended quicker than before. The network connection was stable and fast. I’m happy with the purchase.

DELL XPS13と接続し、SFPは10Gbeの光で使用しています。(テスト的に10GbEのメタルでも使用しましたが、感想は同じ。) 購入当初は非常に調子良く、速度も申し分ない為、気に入っていました。 元々本体自体も結構な発熱量(火傷する程まではいかない程度)で、注意が必要な製品だと思いました。 ３か月程度でノートPCの持ち出し頻度が増え、自宅で利用する機会が減った為、本製品も時々しか使わなくなりました。 購入10か月目頃に久々に使用すると、使用中に本体が異常発熱して、いきなり通信が出来なくなりました。 Linkはしても通信が一切できない状態で、SFP変えようが接続先ポートやIP設定変えようがとにかく通信ができない。 しまいには本体の発熱が火傷するくらいまで高温になり、SFPが幾つか壊れました。 完全に本体故障、オダブツです。 一応保証交換が効いたので、製品送り返して正常品と交換してもらいました。 今後また使い始めたとして、どれだけ持つか、不安ですね。 使用環境がかなりシビアな製品と思われ、安易に飛びついて良い製品とは思えないですね。 性能は本当に文句ないんですが、今回の故障による被害状況や製品単価考えると、保証期限も切れるし、今後の使用はちょっと悩みます。 やはり10GbEのUSB製品は、一般的な家庭環境(所謂人間に適温からある程度過酷な環境)での使用となると製品製造品質的にマージン超えて寿命縮めるレベルで使用は厳しいという事なんでしょうね。(データセンターとかの室温や機器温度の管理が行き届いた場所で使う事が前提なんでしょうね。)