These days RX series became easy to purchase, I personally recommend AMD GPUs.
But among those cards I recommend 1060 6gb, which has best cost efficiency.
3GB version has limited life for mining ethereum because of increasing DAG size.
Hello sev18 , Thanks for your replay ,
I don't mine ETH in the moment , I'm mining zcash , do you think think the 1060 6g will make much differance than 3g
TBH, there is literally no huge difference in hash rates between 1060 6GB or 3GB. My Zotac 3GB Mines at 270 sol/s while Zotac 6GB Mines at 280 sol/s. Moreover, the difference of price point between these two was 75 USD.
I don't think they are worth the price. Go with 3GB if they are really cheap.