Well i think the problem with asrock 13 gpu is this motherboard handle 10 to 12 gpu .I tommorow test results and post my expirience.I have 2 rigs .1 rigs asrock h110 btc+  with 10 gpu 1060 gtx 3gb and this setup  with no problem no freze and no restart
And second rigs asrock h110 btc+ with 13 gpu.and this fuckin rigs has constantly restart abaut 2 hours work
When this rigs has 10 gpu month ago  no restart .and i buy another card and problems comes.