Best GPUs for Crypto Mining in 2019

The NVIDIA GTX 1070 is probably the best outright GPU for crypto mining. It's not being bought for gaming as much now, but it's a great choice if you want to make a return on mining. One of the key factors in choosing the GTX 1070 is its balance of hash rate to power draw. It pulls 30 mh/s but even at full load the maximum power draw shouldn't exceed 150W. You've also got 8GB of memory.

AMD's cards are excellent for mining, and since they're (normally) priced lower than NVIDIA GPUs they're quite popular. The RX 580 has a hash rate of 29 mh/s and a fairly low power draw, albeit with a higher TDP than the GTX 1070 at 185W. The RX 580 should be cheaper than the GTX 1070 though, which can offset the slightly higher overall TDP. You'll be looking at getting a decent and quick return on your investment at a much lower starting price.

The Vega 56 from AMD has great mining performance, but more importantly, prices have come down recently and they're easier to find. However, if you're running it for longer periods the Vega 56 will run hotter than a GTX 1070 and it has a higher power draw with a 210W TDP. In gaming and mining, the Vega 56 can outperform NVIDIA's GPU, so the extra power costs might be worth it. The return will still be good, though perhaps a little longer to achieve.