PTP 3.6 450 Packet Processing limits?

I have a 6.9 mile 3.65 link that has been going for a couple of years now. rcently we have been seeing packet loss at the master on the Ethernet interface. Pushing about 70+ mbps over the link. I have done link tests and they show over 100mbps and no errors on the Rf side of things. The radio is showing lots of ethernet discards and lots of errors.

I was just informed that it could be the processor that has hit its limits around 60+ mbps. Can anyone tell me what the specs are these radios please?