Thank you all for your help. I just change the monitor to a GPU at a PCIe 2.0 x16 instead of PCI Express x1 and the five GPU are working at 22 Mh/s (110 Mh/s Total).
Any advice for a better performance? I don't want to overclock GPU. But maybe with other driver.
Now both rigs are using Driver 22.19.162.4. I prefer no to upgrade is performance will be the same.

Also I have other rig with 6 GTX1070 and is working at 27 Mh/s each (162 Mh/s Total). I don't know if this ones are better, or if it the CUDA that makes them work at 27 vs 22 Radeon.

Thanks again.