with some tuning you should be able to saturate the PCIe 1x slot. Excellent reading on this available here : http://www.intel.com/content/dam/doc/application-

with some tuning you should be able to saturate the PCIe 1x slot. Excellent reading on this available here : http://www.intel.com/content/dam/doc/application-note/82575-82576-82598-82599-ethernet-controllers-latency-appl-note.pdf http://www.intel.com/content/dam/doc/application-note/82575-... and here : https://blog.cloudflare.com/how-to-achieve-low-latency/ https://blog.cloudflare.com/how-to-achieve-low-latency/ Edit : with the inbound 10Gb card referenced