hello, I just tested this with the following specs:

cpu: intel Celeron G3900
motherboard: asus prime Z270-P
ram: crucial 2133 mhz ddr4 4gb
6x rfx 580 8gb hynix memory graphic cards bios oc'ed
OS win 10 pro /w mining optimizations (16gb virtual memory, best performance settings no updates etc)
*edit I have win10 64bit version

running example2platforms worked, example.cmd and best.cmd gave me pause screens.  At first I was getting msvcr120.dll missing errors, this was solved by installing x86 version of visual redis 2013

I got 26 mhs ~ per card after running for 5 minutes no overclocks or undervoltages, 26.5 ~ mhs overclocked with settings -118 cpu core voltage 1150 coreclock 1290 memory clock.  I also tried setting intensity to 23 and then setting priority to realtime in task manager with results of same hashrate.
*edit after putting --asm and running with default settings I got 32 mhs while running example2platform cmd.  after increasing gpu clock to 1250 i got 33.6 mhs.  settings were still with intensity 23

for comparison this rig runs 30 mhs on claymore dual miners per card with optimizations

hope this helped and maybe this can be solved.  would be insane to mine vertcoin with 580s at 40+ mhs