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If the Series2 has a TSN that starts with 110/130/140 then it has USB1.1 HW, otherwise it has USB2.0 HW - and that's not just boxes that start with a 2, since newer boxes start with a 5.
And, despite what CuriousMark said, it DOES make a difference. While USB1.1 has a theoretical max of 12Mbps, you never get that performance in the real world - 5-6Mbps is more like it, and that is a bottleneck. So if you has USB2.0 ports you do see higher performance than with 1.1. And the TiVo adapter performs best of all.
And, despite what CuriousMark said, it DOES make a difference. While USB1.1 has a theoretical max of 12Mbps, you never get that performance in the real world - 5-6Mbps is more like it, and that is a bottleneck. So if you has USB2.0 ports you do see higher performance than with 1.1. And the TiVo adapter performs best of all.
