It certainly could be the chipset. Specifically, it's the Intel C224 Express PCH chip(set) on the Supermicro X10SLM+-LN4F motherboard. The Ethernet chips are Intel i210AT controllers. But other than the link to the upstream support site, I don't have a good source of expected compatibility data. Thanks, --Bill On Thu, 23 Jun 2016 05:28:54 +0200, Walter H. wrote > On 23.06.2016 02:52, listmail wrote: > > According to the compatibility chart over here: > > https://access.redhat.com/support/policy/intel > > ...anything later than 6.3 (6.4 and up) should work with the E3-12xx v3 > > family of processors. But those are not the results I am seeing. > > > > Does anyone have experience or commentary on this compatibility issue? > > > can it be the chipset, that is causing this?