We had a RB750Gr3 that was starting to max out on CPU load on a router that was being used as a PPPoE server with about 180 PPPoE clients and also running some queues, filters, etc with about 400Mbps of data flowing through during peak times. We decided to try a RB5009 and a RB4011 to see how they would handle the CPU load. You can see on the chart where the RB750Gr3 was being used from 12/25 through 1/12 and then the RB5009 from 1/13 through 1/16 and then the RB4011 from 1/17 through 1/23. It seems the RB4011 is handling the load about the same but for some reason something is spiking the Processor 1 much more than when using the RB5009. Does anyone have any ideas what might be causing this?