I run 7 udp bandwidth tests from this router to 7 other router with udp size packet=150 , after some time router show incredible numbers )) (conntrack enabled, no firewall rules exept 1 nat rule)
640000 pps !!! Mikrotik - good work !

Nice result, but CPU utilization when doing bit more real world work would be more interesting. By real world i mean PPPoE encaps/decaps, firewall, NAT, some mangling for load balancing/policy routing ....Router 1:
Xeon 4 cores 2400Mhz
Intel Gigabit Desktop Adapter (82574L) PCI-E
<->
Router 2:
Core Q8400 2660Mhz
Intel Gigabit Desktop Adapter (82574L) PCI-E
Result:
rx/tx - 950000 pps