Ethminer how to mine with multiple GPU?

[mat5551]

140MHs
more coming soon
thanks guys

i have considered wifi as one of the reasons but my router is situated really bad
made some testing but have to find another place...

due to BBC Winter is coming but thanks to GPUs i consider this as not woth of mentioning 

[Tacalt]

hi guys

having similar problem

getting json-rpo all the time

i have bought 6 gpus 3+3 sepparate   R9 380x
so 3 gpus per rig.
using windows 10, latest amd drivers, ethminer 0.9.41 genoil 1.0.4b3

bat file
setx GPU_MAX_ALLOC_PERCENT 99
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_HEAP_SIZE 100
ethminer.exe --farm-recheck 100 -F http://eth-eu.dwarfpool.com:80/address/Worker1 -G --opencl-platform 0 --cl-global-work 8192

one card works fine
two...they work but sometimes not
Three , not at all. json error

thank you

If you buy the Asrock H81 or H61, you can put 6 GPU into 1 rig, that will reduce the cost of the system, ie one motherboard instead of 2.

[CitizenEra5ed]

I'm trying to get my 5 card 280x rig running but ive no idea if its going to work or not. I've used the bat file which cdub kindly posted above. I've run it and it is still generating the DAG file after over 1 hour. Is this correct?

It got up to 100% earlier,then it started again, much slower and I'm seeing all sorts of lines such as

gpu miner1 work loop....
Pause 9858ms
gpu miner 1 stopping 11812ms
gpu miner 1 workloop....
main start worker
 and so on...

should I be seeing this.

Sorry for the noob questions but I'm new to Ethereum...

Edit: it has started mining

[Tacalt]

I'm trying to get my 5 card 280x rig running but ive no idea if its going to work or not. I've used the bat file which cdub kindly posted above. I've run it and it is still generating the DAG file after over 1 hour. Is this correct?

It got up to 100% earlier,then it started again, much slower and I'm seeing all sorts of lines such as

gpu miner1 work loop....
Pause 9858ms
gpu miner 1 stopping 11812ms
gpu miner 1 workloop....
main start worker
 and so on...

should I be seeing this.

Sorry for the noob questions but I'm new to Athereum...

Edit: it has started mining

If it is first time you start mining, the etherminer will generate two DAG files. So it will take a while to start mining.