Hi,
over one year ago I had to switch my Nvidia 1060 3GB GPUs from Ethereum to Ravencoin. Was a good decision I think and mined a lot.
Since 2 months now RVN difficulty exploded. (Does anyone know the reason?)
So I think I should switch to another coin again now.
Which one would you suggest for my old GPUs?
I think that reason should be there was a lot of new miners joined in the RVN it has increased 1/5 from the total hashrate in the network and that's the main reason.
You can try to take a look at vert, ubiq and monero. I think your GPU is still worth to mine these coins that already mentioned by me.