Mac Pro rev 1,1 and ethernet adapter performances

[LaurentR2D2]

Hello,
There is two Mac in my house. Both are connected to the internet box with a cat 6 RJ45 cable. When I look on nperf.com, I have very different results concerning performances of the network :

1) Mac Pro rev 1,1 : connected to the internet box with a 12 meters RJ45 cat 6. I get a maximum of 100 Mbs download. I get 190/200 Mbs in upload.

2) iMac end 2012 : connected to the internet box with a 4 meters RJ45 cat 6. I get a maximum of 230 Mbs.

What can be the cause of such a difference ? Could it be the network card of the Mac Pro rev 1,1 which would not be able to go beyond 100 Mbs ? If yes, can I change it for a better one ?

Thank you

 

[vworks]

check the network settings/advanced/hardware and try to set them to 1000baseT and see if it changes...
[doublepost=1512692982][/doublepost]

 

[LaurentR2D2]

check the network settings/advanced/hardware and try to set them to 1000baseT and see if it changes...
[doublepost=1512692982][/doublepost]

I've put the settings you show, but it's not better.

 

[vworks]

Strange.
The card is capable of 1 gigabite so this is not hardware problem.
I had the same mac and it handles more than 100 mbps download.
In my case, I was limited by the router.

 

[orph]

may also be something like the limit of a drive or cpu is being hit?

 

[William_si]

The cable seems to be horribly shielded on one pair, as you sync at GE and upload seems better.

The onboard adapters can use full Gbit fine, simultaneously, however a USB adapter will always be limited to ~450Mbit until 2013 with USB 3. FW ethernet cards seem to exist, but i doubt their use case over a USB 3 card and a good USB Gbit adapter which is cheaper and overall also more secure (as FW operates with DMA).