pppoe-server CCR1016-12G

Hi guys.
In one vlan, look at several pppoe servers. The servers are assembled on Linux + pppd. Each server holds 800+ users with traffic up to 1 Gb / s. I decided to add another Radius server, but already on Mikrotik CCR1016-12G. The problem is as follows. Loaded servers on Linux respond faster to the user’s request than the non-downloaded Mikrotik.
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1225x155(63.19 kB)](http://www.fotolink.su/v.php?id=2fd542da49ededc0437270ae0f92a650)
I missed something, and is it possible for the CCR1016-12G to hold 800+ user sessions with traffic up to 1 Gbps?