TP-Link PCI gigabit network cards capping at about 300mbps

[Bdog0820]

I have two Tp-link gigabit pci cards that are BOTH capping at 300mbps. I am planning to use them both for Pfsense but when there are in use i only can only top out at 150mbps. My onboard ethernet port through my PC pulls over 900mbps through my ISP so it is not my ethernet cable or ISP. If it was capping at 100mbps that would make more sense since it is most likely the link speed, but clearly my link speed is 1 gig..... Any ideas?

Edit: I found two more never used cards, I am still receiving the same results. I am not sure whats going on.

 

[kanewolf]

You didn't post a model number for the card. If you don't like the performance with TP-Link use another brand. Intel cards have never disappointed me.

 

[smorizio]

if it not the cards the cards may not like the cables that your using. one thing to check on the cards make sure they have the newest firmware on them to rule out any bugs.

 

[Phillip Corcoran]

And latest driver for it too (TP-Link website).

 

[brunis]

I have two Tp-link gigabit pci cards that are BOTH capping at 300mbps. I am planning to use them both for Pfsense but when there are in use i only can only top out at 150mbps. My onboard ethernet port through my PC pulls over 900mbps through my ISP so it is not my ethernet cable or ISP. If it was capping at 100mbps that would make more sense since it is most likely the link speed, but clearly my link speed is 1 gig..... Any ideas?

Edit: I found two more never used cards, I am still receiving the same results. I am not sure whats going on.

Check your task manager under the performance tab, could easily be AntiVirus or Firewall kicking in and churning 100% of your cpu. I had this issue with 10Gbit Infiniband.