
Purchased 1ft rackmount patch panel cables to connect to 2 gigabit ethernet ports as I have previously connected 3ft Cat5e cables to these ports . After these cables were installed, they were tested and my data transfer rate dropped from 80MB/s to 5MB/s. I thought I had a problem with my switch, so after a few hours of troubleshooting I switched back to my 3ft Cat5e cables and the transfer speed was right back up to 80MB/s. (For integrity reasons I transferred the same files to try to reproduce the issue). I don't know what type of copper is used, but these cables are junk.

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