RB 44 Rhine Rev 150 Issue

I have installed RouterOS 4.9 On a box and 1 RB 44 Rev 150. Im connecting directly to another RB 44 in another machine and bandwidth test show no faster than 10mps.

Ok I put A rev 134 Router Board in the box and got 95mps.

Then I Put the Newer rev 150 Back in to the box and it works fine now. It shows Rev 134 Driver in the PCI under system resources..Is there an issue with the rev 150 Drivers?? How Can I force rev 134 During Installation?

There should be no difference in drivers for the same card from router point of view.
If you are able to reproduce the problem with 10Mbps/RouterOS 4.9 installed, generate support output file from your router and send it to support (support@mikrotik.com).