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I bought some factory-made Cat6e cables after I ran into issues at 1gbps with inferior cables, but I'm encountering a whole new world of problems now!

I expected upon connection to the switch the computers in question would jump straight to gigabit connections as they did with the Cat5e cables used beforehand. However, both machines refused to do so. One auto-negotiated a 100mbps connection after much deliberation and the other did nothing at all until I forced it to use 100mbps half or full duplex.

What's interesting is that if I force one machine to 1gbps, it sits on it for a while then finally connects. The other (which auto-negotiated 100mbps) gives up and ignores my request, eventually dropping back to its 100mbps connection.

What's going on?! Is it possible I just have two dead cables? They're allegedly tested and working. The old Cat5e's will get gigabit connections, but keep strangling the throughput at regular intervals - one was an inordinately long 50m, when all I needed was 15m.
 

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unless the cables are running near electrical equipment generating EMF the cables are not the issue. I would suspect your switch is the issue.

50 meters is only half of the limit of ethernet which is 100 meters. Length was not a issue.
 

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I assume that you checked that the cards in the machines are capable of gigabit speeds per the manufacturer. If so, I think I would at least try the latest motherboard or nic card drivers and see if that helps at all.
 
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