---------------------------------------------------------------------------------------------
Hey,
I just wanted to thank you for your great post and solution.
I had the same issue with MNPA19-XTR connected to Intel X520-2 (2 port SFP+).
I had the MNPA19-XTR installed on my desktop connected to one of the ports of the Intel X520-2 on a server machine.
After a couple of jperf tests I was not getting any speed greater than 7Gbps. Just to confirm your solution I went to my MB BIOS (ASUS MAXIMUS_XI_HERO) and changed the speed of PCIE from X2 to X4 and voila i tested and got the full 10Gbps speeds.
For people with the same issue make sure you follow the steps below:
1-If you are using any PCIE anything other than the first PCIE on you MB make sure you have the full speed enabled.
In my case my GPU was located in PCIE16_1 and the NIC was in PCIE16_3.
View attachment 12730
Here is how to enable it in you ASUS bios:
View attachment 12733
2-I installed latest driver 5.50.14688 and it gave me full speed:
View attachment 12731
3-Under performance make sure to select single port traffic or single stream traffic then hit Run Tuning and restart computer.
4-Under advanced:
Interrupt Moderation---->Disable
Jumbo Packet---->9014 (this could be different but i matched it with the highest value on my server Intel X520-2 NIC)
5-Receive Buffers and Send Buffer---->4096 or to its maximum value.
7-Make sure to assign static IP on each NIC.
8-Add the IP address and name of the target machine to the Host file on windows. Let me know if you have questions on how to do this (this will force windows to use the 10gb and not the 1gb LAN speed).
6-Use iperf or jperf or RAM disk to test the speeds. Below are my results from Jperf:
bin/iperf.exe -s -P 0 -i 1 -p 5001 -f g
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 0.00 GByte (default)
------------------------------------------------------------
OpenSCManager failed - Access is denied. (0x5)
[392] local 192.168.50.3 port 5001 connected with 192.168.50.1 port 53662
[ ID] Interval Transfer Bandwidth
[392] 0.0- 1.0 sec 1.07 GBytes 9.21 Gbits/sec
[392] 1.0- 2.0 sec 1.13 GBytes 9.71 Gbits/sec
[392] 2.0- 3.0 sec 1.15 GBytes 9.86 Gbits/sec
[392] 3.0- 4.0 sec 1.15 GBytes 9.85 Gbits/sec
[392] 4.0- 5.0 sec 1.15 GBytes 9.86 Gbits/sec
[392] 5.0- 6.0 sec 1.15 GBytes 9.87 Gbits/sec
[392] 6.0- 7.0 sec 1.15 GBytes 9.88 Gbits/sec
[392] 7.0- 8.0 sec 1.15 GBytes 9.89 Gbits/sec
[392] 8.0- 9.0 sec 1.15 GBytes 9.86 Gbits/sec
[392] 9.0-10.0 sec 1.13 GBytes 9.72 Gbits/sec
[392] 10.0-11.0 sec 1.14 GBytes 9.75 Gbits/sec
[392] 11.0-12.0 sec 1.15 GBytes 9.86 Gbits/sec
[392] 12.0-13.0 sec 1.14 GBytes 9.80 Gbits/sec
[392] 13.0-14.0 sec 1.14 GBytes 9.76 Gbits/sec
[392] 14.0-15.0 sec 1.14 GBytes 9.80 Gbits/sec
[392] 15.0-16.0 sec 1.14 GBytes 9.83 Gbits/sec
[392] 16.0-17.0 sec 1.15 GBytes 9.89 Gbits/sec
[392] 17.0-18.0 sec 1.15 GBytes 9.90 Gbits/sec
[392] 18.0-19.0 sec 1.15 GBytes 9.90 Gbits/sec
[392] 19.0-20.0 sec 1.14 GBytes 9.75 Gbits/sec
[ ID] Interval Transfer Bandwidth
[392] 0.0-20.0 sec 22.8 GBytes 9.80 Gbits/sec
All the credit goes to mfgmfg for his/her great post and solution!!!!!
Thanks again for this.
