You can start dual mine Ethereum or zcash with your GPU .

To dual mine Ethereum you will need claymore client and you can use Nanopool . At Nanoopool they will give you the config file all you need is to enter you address .

Or you can simply use nicehash client and leave it to them they will choose the best options for all your rig including CPU and pay you with BTC directly . 

- As for CPU I have no idea .