Thanks for contacting Intel.
As per server specs, it appears that the Intel X710-DA2 Adapter is not listed as supported part. This is why you are getting issues even when installing using different driver versions. Please refer to website below: PowerEdge 2970 Rack Server Details | Dell
Thanks @Sandy_Intel! That would explain why the 520 was working..sort of. It would crap out on large file transfers. That's why i got the 710 to try. The 520 works fine in day to day but if you try to copy a large file the NIC would reset and disconnect/reconnect. Couldn't get that figured out.