Thank you for contacting Intel.
You may use the QSFP+ Breakout Cable with Intel® QSFP+ Configuration Utility (QCU) to split the 40Gb port into 4x 10Gbps ports. This utility is included in adapter's driver. Refer to our websites below:
2. Network Adapter Driver for PCI-E 40 Gigabit download page
Feel free to contact us again if you need further assistance.
Thanks for writing back.
Yes, you may connect an X710 Network Card to another X710 Card. The performance results may vary when speed settings are mixed. It would be best to use our twinaxial cables.
Name Product Code Intel® Ethernet SFP+ Twinaxial Cable, 1 meter XDACBL1M Intel® Ethernet SFP+ Twinaxial Cable, 3 meters XDACBL3M Intel® Ethernet SFP+ Twinaxial Cable, 5 meters XDACBL5M
Please refer to website below for more information:
Hope this is helpful.