Hi everybody, i have a problem with my rb750g. If I connect into routerboard my pc and my ntb and try to copy data from pc to ntb, then average speed of copying is around 20 - 25 MB/s. But if i try to copy data from ntb to pc, average speed of copying is around 50 - 300 kB/s. All ports (pc and ntb) are negotiated at 1 Gbit/s. But if I connect pc and ntb together lan 2 lan, then average speed of copying in first direction is around 40 MB/s, and in second direction is around 50 MB/s.

I tried almost all version of routeros (4.0 to 5.0rc7), try to set all possible options, install newest drivers of all possible lan. First LAN (in PC) is Marvell Yukon 88E8056 PCI-E gigabit controller, second LAN in PC is Marvell Yukon 88E8001/8003/8010 PCI Gigabit Controller and in NTB is Broadcom NetLink (TM) Gigabit Ethernet. I try a new piece of RB yet.

Can anyone help me with this problem?

1) What kind of traffic do you send over the router?