Any other ideas? This is unusabley slow. Here are the two cards both in x8 electrical slots. One system is an e5-2670 in a Supermicro X9SRL-F with 32GB of RAM with Windows 10 64-bit and the 5.10 drivers. The other a dual e5-2670 system in an Intel S2600CP with 64GB of RAM on Ubuntu 14.04.4 64-bit. I have even tried setting the MTU to 9000 on both ends with no benefit. This is turd slow...
Code:
C:\Users\rubylaser\Downloads\iperf-3.0.11-win64>iperf3.exe -B 192.168.50.2 -c 192.168.50.3
Connecting to host 192.168.50.3, port 5201
[ 4] local 192.168.50.2 port 57282 connected to 192.168.50.3 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.00 sec 512 KBytes 4.19 Mbits/sec
[ 4] 1.00-2.00 sec 128 KBytes 1.05 Mbits/sec
[ 4] 2.00-3.00 sec 1.50 MBytes 12.6 Mbits/sec
[ 4] 3.00-4.00 sec 640 KBytes 5.24 Mbits/sec
[ 4] 4.00-5.00 sec 4.62 MBytes 38.7 Mbits/sec
[ 4] 5.00-6.00 sec 5.62 MBytes 47.3 Mbits/sec
[ 4] 6.00-7.00 sec 1.88 MBytes 15.7 Mbits/sec
[ 4] 7.00-8.00 sec 6.62 MBytes 55.6 Mbits/sec
[ 4] 8.00-9.00 sec 1.38 MBytes 11.5 Mbits/sec
[ 4] 9.00-10.00 sec 5.38 MBytes 45.1 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-10.00 sec 28.2 MBytes 23.7 Mbits/sec sender
[ 4] 0.00-10.00 sec 28.1 MBytes 23.5 Mbits/sec receiver
iperf Done.