Hello everyone!
I installed ros 5.26 on x86
I need to install two gbit/s network apapters, what lowcost adapters will work on it?

How about this?

http://routerboard.com/RB44Ge

low cost please...

and i need two x 1 gbit/s port

This one here seems pretty cheap for a 1000 Mbps PCI-E card.

I'm not sure if it would work with RouterOS, but that said, I've tried dozens of different Ethernet adapters on different RouterOS installations, and I have yet to find an Ethernet adapter that doesn't run on RouterOS.

I'm using 2x TP-Link TG-3468 PCIe Gigabit (RTL8168). Works like a charm. Just remember, RTL8111/8168 (PCIe) shares the same driver with RTL8169 (PCI)!! So never ever use both in a system!!