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Transfer speed tests: 802.11ac

Discussion in 'TiVo Premiere DVRs' started by howards, Jun 8, 2013.

  1. aaronwt

    aaronwt UHD Addict

    Jan 31, 2002
    I run my TiVos now with only one ethernet connection from one Elite to my network. Then my second Elite and two Minis are connected over MoCA. My OTA Premere is connected to my second Elite from it's Ethernet port. So for me to transfer to TiVo desktop, each TiVo can only send data through the one ethernet connection on the first Elite.

    I only recently tried this with my current setup, but when I was transferring data to TiVo desktop concurrently from my two Elites and OTA only Premire, the data was consistently above 100Mb/s. It fluctuated between 125Mb/s and 140Mb/s. I had never seen speeds that high when transferring from Premiere to Premiere when everything was connected from just Ethernet.. I saw peaks of 130Mb/s but it was not consistently high like I saw last weekend when I did those concurrent TiVo Desktop transfers.
  2. socrplyr

    socrplyr Active Member

    Jul 19, 2006
    Are you referring to the combined transfer rate of all concurrent transfers? If so, that makes perfect sense. However, each individual transfer would be limited below 100Mbps. I did not mean to infer that you couldn't make some use of the 1Gbps switch inside the Premiere 4s. What I meant was that actual access to that specific Tivo's information was limited to 100Mbps.

    Ignore the packaging for a second and just consider the hardware present (and I am going to reduce the number of Tivos to 2 for simplicity). Internal to the "gateway" Tivo is a 1Gbps switch. One of its ports is connected at 1Gbps to your home network. Another of its ports is connected at 100Mbps to the SoC of the "gateway" Tivo. A third port is connected to the MoCA ethernet adapter also inside the "gateway" Tivo at an unknown rate (probably 100Mbps though). That means that the "gateway" Tivo can talk to your computer at a max of 100Mbps, while at the same time a Tivo on the other end of the internal MoCA adapter can also talk at that 100Mbps rate (limited for the same reason the "gateway" one is limited). (With both Tivo's transferring to your computer, they would net a maximum of 200Mbps). Now a Premiere 4 is nearly exactly this setup with the 1Gbps ethernet switch, SoC, and MoCA adapter all integrated into the same mainboard. If you believe I misinterpreted your throughput numbers, just let me know. Tivo would have had to put in a significant time and effort to get transfer rates higher than 100Mbps for a single Tivo with the BCM7413 SoC (either adding an addtional network adapter or bonding, both with major drawbacks - cost/power/configuration).

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