This is a full guide on how to mine for ETH with your graphics card:
Claymore miner, You can get it from the download link in this post https://bitcointalk.org/index.php?topic=1433925.0 made use of the Mega download server and then you select the version 10.0 catalyst version. Just unpack the zip file somewhere.
You will need a Ethereum pool to mine with, you can see a comparison of pools here https://www.cryptocompare.com/mining/#/pools. I personally use https://nanopool.org/ as they have a 1% fee and one of the largest and robust pools.
You will need a Decred/Siacoin/Lbry/Pascal pool which ever you decide to dual mine with. I decided on Sia as it shows a lot of future potential, has a low difficulty so easier to get full coins. I'm using the https://sia.nanopool.org pool for the same reasons as Ethermine. You will need to register an account with them but this is quick, their setup guide is also quite easy to follow. If using Nanopool on Sia you will need to set up a miner under your profile as you will need the miner name and password in the batch file.
You will need a wallet to store your coins in, I'm making use of Jaxx for ETH as it supports multiple alt coins but you can create any ETH wallet. I've also created an account on the Poloniex exchange where I will be transferring my SIA to and then converting into either ETH or BTC when the coin values are good.
Set up the Claymore script. For this you go to the Claymore folder that you unpacked and look for the batch file named "start". Right click on this file and click edit. Below is my configuration.
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
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 eth-eu1.nanopool.org:9999 -ewal 0x0f8be67ed2ee2e2cae82235aa627cda58cd7c374.username/your@email.com -epsw x -dcoin sia -dpool sia-eu1.nanopool.org:7777 -dwal ef6cf5a4160df11dc08efa6110902347904cb4209de2e0d1045e83d5efc0516a9e0c5e5ca47d/username/your@email.com -dpsw x -ftime 10
-epool = Address of the ETH pool you are mining for
-ewal = this will be your ETH wallet address
-apsw = will always be x
-dpool = Address of the LBC pool you are mining for
-dwal = this will be your LBC address, Suprnova has a built in wallet which I'm using. It consists of your [registered name].[miner name]
-dpws = this will be x if you are not using Suprnova or the password that you used when setting up your miner in Suprnova
-dcoin = this is the other coin that you will be mining in my case Lbry so lbc
When this is done save and then run the batch file, it will automatically start the miner.
If you have entered everything correctly you will get the below, if it says connected and authorized you know you are good to go.
ETH: Stratum - Connected (eu1.ethermine.org:4444)
LBC: Stratum - connecting to 'lbry.suprnova.cc' <37.187.27.4> port 6256
ETH: Authorized
LBC: Stratum - Connected (lbry.suprnova.cc:6256)
LBC: Authorized
There are further advanced commands to get optimal rates but I haven't played around with them.
You can watch a step by step tutorial here:
Source: http://carbonite.co.za/showthread.php?161129-Nicehash-vs-Claymore-Dual-Mining/page2