Ethereum + ? // What dual currency should i pick? for the Claymore miner?

[distinct_user]

OS: Windows 10 Pro
Graphics Cards: 3x GTX 1060 MSI Gaming X 6GB (getting another 3 soon.)

(I don't want to go higher than 80% TDP per card.)

[Vann]

Nvidia 10 series cards are not as good as AMD RX 4XX/5XX cards for dual mining. I would get a couple of RX 4XX/5XX 4 GB cards instead if you want to dual mine ETH. They have a better hash rate for ETH than a 1060 as well. You can see which coin is more profitable to dual mine with the whattomine calculators.

https://whattomine.com/merged_coins/1-eth-dcr

[distinct_user]

Nvidia 10 series cards are not as good as AMD RX 4XX/5XX cards for dual mining. I would get a couple of RX 4XX/5XX 4 GB cards instead if you want to dual mine ETH. They have a better hash rate for ETH than a 1060 as well. You can see which coin is more profitable to dual mine with the whattomine calculators.

https://whattomine.com/merged_coins/1-eth-dcr

I already have the mining rig set-up.

I just need to start mining.

[puwaha]

If you are asking what coin to dual mine based on profit, then like Vann said, check whattomine.  That coin will change all the time depending on a number of factors like conversion to BTC rate, difficulty, etc.

If you are asking what coin to dual mine based on the potential of the coin, then I suggest Sia coin.  It's actually got a real-world use case, a hardware "minebox" server on the way, and an ASIC coming next year.  I'd collect as many Sia now as you can, as I think it's value will steadily increase over the next year.  You also may end up using your Sia coin to store your backups in the distributed "cloud" soon... so having cheap Sia now could be beneficial.