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I used cat 6 and cat 5e crossover cables directly between a laptop and a desktop. I set my computer ports (both of them) to max speed of 1gbps. I tried different cables. The speed does not go above 50-60 mbps. I can transfer files manually using SSD with speed of 700mbps but with these cables is limited to less than 60mbps.

Could you please help? I am skeptical of missing possible software or hardware points.

Peregrino69
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Steve
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    "*The speed does not go above 50-60 mbps*" -- How are you "measuring" this "speed"? – sawdust Feb 24 '23 at 23:34
  • How do you use an SSD to “manually” transfer the files? What are you transferring between? – doneal24 Feb 24 '23 at 23:40
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    FWIW, there is no reason to use an Ethernet cross-over cable on modern systems. That is strictly for systems that need a cross-over cable which are typically legacy systems with legacy Ethernet hardware. Try using a regular Ethernet cable and see what happens. – Giacomo1968 Feb 24 '23 at 23:49
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    I was gonna say that. All gig and better Ethernet does auto mdix – Journeyman Geek Feb 25 '23 at 00:23
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    You probably have a miswired or poorly terminated crossover cable. Even if you used a pinout tester, you might still have a split pair. Simple pinout testers can't detect split pairs. – Spiff Feb 25 '23 at 01:36
  • so 50-60 mbps (megaBits/sec) is 6.25-7.5MB/s (megaBytes/sec). is that what windows is reporting? 700mbps is 87.5MB/s, which is pretty slow for an SSD. are you sure you are using mbps when you mean MegaBits and MBps when you mean MegaBytes? are all your measurements using the same unit of measurement? I agree with the others about ditching the cross-over cable, and just using a good certified cat6 straight-through cable. also set your ports to autonegotiate. its possible to cause issues by specifying a speed and duplex when you have different device manufacturers involved. – Frank Thomas Feb 25 '23 at 02:08
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    I wonder if it's the same issue as https://superuser.com/q/701273/10165 - it's not happy with the x over and dropping down to fast Ethernet (as it's supposed to) – Journeyman Geek Feb 25 '23 at 03:00
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    I'd also add to the mix - generally setting link speeds etc. is unnecessary. Autonegotiation has been around for a long time. The interfaces will negotiate the appropriate possible speed/duplex settings for the link; the highest available if nothing's wrong. – Peregrino69 Feb 25 '23 at 08:54
  • When you set the link speed, the port defaults to half-duplex. You therefore also have to set it to full-duplex. – Bib Feb 25 '23 at 11:22

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