USB 3.0 Ethernet Adapter with full gigabit speeds?

Discussion in 'Mac Accessories' started by el-John-o, Oct 8, 2018.

  1. el-John-o macrumors 65816

    Nov 29, 2010
    Hey friends!

    Reviews on Amazon are unhelpful. I'm searching for a USB 3.0 gigabit ethernet adapter that will handle a full gigabit load. Reviews online show people reporting various models both do and do not actually see those speeds. It's possible that they don't; and the people who say they do just see "1.0Gbps" in Windows and assume it does. It's also possible they do; and the people who are testing them have disk/cpu bottlenecks. It's frustrating!

    So I'm turning to you all! I know that I can sustain ~900mbps to my server from my Windows PC; faster than I can obtain via Wi-Fi on my 2016 15" MBP. Have any of you found a USB 3.0 adapter that successfully achieves full gigabit speeds? It would ideally be a USB 3.0 (Type A) device, as I have all four USB-C ports populated (2x 4K panels, charge, and the displays in-built USB 3 hubs daisy chained together and then connected via an A to C adapter). This adapter would connect to one of my displays existing USB 3.0 ports. (The next issue is, of course, whether there's enough USB bandwidth to handle transferring large files from a USB 3.0 RAID array through a USB 3.0 gigabit adapter on the same bus. In theory; it should be plenty, since Ethernet will bottleneck the drives anyway.)

    Thoughts? Suggestions?

  2. Howard2k macrumors 68020


    Mar 10, 2016
    I have an USB3 Insignia thing from Best Buy.

    My recollection is that my HP with on-board Gig E can pull from the NAS about about 80MB/s (tried it a month or so ago for laughs). I suspect that's a limitation of my HP's storage, but not 100% sure.

    So I tested the USB3 with my 2015 MBPro evening for the first time, actually checking the results, and I was surprised. I assumed it was faster than my AC1750 wifi, but I was pleasantly surprised how much faster it was.

    I was hitting peaks of 126MB/s, according to Activity Monitor. I bounced between that and perhaps 96Mb/s, so perhaps 888Mb/s. Without knowing exactly how that is calculated, I'm willing to accept that its a surprisingly capable adaptor. Insignia NS-PU98635.
  3. apiro macrumors regular

    Oct 23, 2017
    I have this one - gigabit on both of its ports via MBP 15" late 2013.
  4. Mr. Retrofire macrumors 603

    Mr. Retrofire

    Mar 2, 2010
    I use this USB 3.0 to Ethernet Adapter (the USB A version):


    It is available under many different brand names (Atolla, Techole) and a bit cheaper on ebay. The Ethernetport supports up to 980 MBit/s in real tests and the USB 3.0 ports support UASP (I tested this with an external SSD). The USB A version uses a Realtek RTL8153. Works without additional drivers on OS X / macOS 10.11 or newer.
  5. deeddawg macrumors 604

    Jun 14, 2010
    If your NAS is a small SOHO dual-drive-mirrored unit, then those speeds are likely HDD limited. Though lots of other factors could be in play such as competing network traffic.

    I have this little adapter:
    Testing via my fiber ISP connection I've measures ~920-940Mbps each direction. Didn't do a test against my NAS though.

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4 October 8, 2018