Hi Guys, I am new here and also new on the mining world.  there is to much information to learn!

I am having issue, with my rig, I can't get more that 16 Mh/s on my GPUs, and i have not cloud what to do, I read the post here and see that each GPUs should be at least around 25Mh/s.

Mine setup is

4 XFX AMD R580 black edition with driver version 23.20
asrock H110
corsair HX1200i
running windows 10
running claymore 10.5

and this is start.bat file

setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100
EthDcrMiner64.exe -epool eu1.ethermine.org:4444 -ewal . -epsw x -etha 0


I would appreciated any comments or any ideas to improve my Mh/s
thanks