Is there any way to mine this thing with 3-4gpu on a single mobo? I have 3 gpus atm.. Anyhow i try, 1 gpu is off and only 2 works.
Yes, it's no different to any other coin in this regard, I'm mining with a 4 GPU rig here right now.
Are you using the vertminer (latest) from vertcoin.org ?
Please post here instead to get set up - it helps keep the main thread uncluttered:
https://bitcointalk.org/index.php?topic=416572.new#new