Hi everyone, I'm going crazy over a problem I keep having with the asrock H110 BTC pro+ motherboard (if that is indeed the problem)
The problem is simple: I am running it with 8x gtx 1050 ti to mine ethereum using nvOC, only 6 of the 8 gpus work at full speed (~13 MH/s), the other 2 work at about 1 or 2 MH/s. Here is what I tried in order to make the rig work properly:

- different operating systems: Windows 10, simple mining OS
- updated motherboard bios
- changed pcie settings in the bios (gen1, gen2, other power settings)
- tried other pcie risers, power and usb cables, and cross checked to make sure everything was working (including, of course, the gpus)
- different miners (ethminer, genoil, claymore's)
- upgraded ram from 4 to 8 gbs

and combinations of the above.

Now as you can imagine I'm getting desperate because I cannot understand what is wrong with my system. If any of you had experienced this kind of issue it would be very appreciated if you could help a fellow miner

Full system configuration:

Asrock H110 BTC pro+
Celeron g3930
4GB ddr4 2400
ssd kingdian 60GB
PSU Thermaltake 730W
8x gtx 1050 ti (6 Gigabyte low profile, 2 KFA2)