HP 560SFP+ bandwidth issues

[klat0n]

Hello All,

I am looking for help regarding bandwidth speed for my NIC/computer/software configuration.  

Computer: HP Z820 windows 7 64bit

NIC:HPE 560SFP+ 10Gb/s

Test Software: iperf3 

When i test the throughput  (using iperf3) from server to client , I can only get about 2.3 Gb/s for about 90 secs.  After that the through put goes up to about 8.3 Gb/s.  

Why does the connection start at 2.3 Gb/s and not 8.3?  Is there something in the NIC, BIOS, or windows O.S.? I can configure?

Note: while observing the CPU in task manager, one core is being utilized for the first 90 sec's 2.3 Gb/s and then the CPU core utilization decreases when the bandwidth increase to 8.3 Gb/s. it looks like three more CPU core increases utilization as well.

[Vajith V]

Hello @klat0n 

This community forums is for Hewlett Packard Enterprise (HPE) products & services.

For HP products, you may have to post in the HP Support Forums: https://h30434.www3.hp.com/ or Please visit www.hp.com.

Regards,
Vajith