6800 XT vs 3070 TI

[Outhue]

Their performance mining Ethereum is almost the same, the real difference begins with mining other algorithms so this is a decision only you can make, do you have interest to mine another algorithm besides Ethereum and hold? If yea goes with Nvidia the 6800 can mine ravencoin and a few others don't get me wrong but you will get the upper hand with the Nvidia, buy the AMD only if you see a very good price.

After the end of ethereum mining, both video cards will probably give a very small profit. Nvidia is better at mining some coins, AMD video cards are better at mining other coins, but probably more than 80% of video cards mine Ethereum.
16 GB memory is probably better than 8 GB in the future.

Since Ethereum get launched this is the second year that you can't mine ETH with 4GB anymore, its been many years so far, imagine if one has a 8GB graphic card lol, now that Ethereum is going PoS it doesn't matter anymore and its going to be tough to see another coin that will make 8GB graphic cards get expired.

[FP91G]

Their performance mining Ethereum is almost the same, the real difference begins with mining other algorithms so this is a decision only you can make, do you have interest to mine another algorithm besides Ethereum and hold? If yea goes with Nvidia the 6800 can mine ravencoin and a few others don't get me wrong but you will get the upper hand with the Nvidia, buy the AMD only if you see a very good price.

After the end of ethereum mining, both video cards will probably give a very small profit. Nvidia is better at mining some coins, AMD video cards are better at mining other coins, but probably more than 80% of video cards mine Ethereum.
16 GB memory is probably better than 8 GB in the future.

Since Ethereum get launched this is the second year that you can't mine ETH with 4GB anymore, its been many years so far, imagine if one has a 8GB graphic card lol, now that Ethereum is going PoS it doesn't matter anymore and its going to be tough to see another coin that will make 8GB graphic cards get expired.

What if a new coin appears that requires more than 8 GB of memory? It is beneficial for video card manufacturers to have miners buy new video cards. my old GTX 1070 video card has 8 GB of memory, and then it will be relevant for a long time, and this is unprofitable for Nvidia.

[Coinfarm ventures]

That's right. I would not buy any video card for mining with less than 8GB of VRAM. I prefer 12GB or higher because of the dual mining potential.

[Takyeon]

Their performance mining Ethereum is almost the same, the real difference begins with mining other algorithms so this is a decision only you can make, do you have interest to mine another algorithm besides Ethereum and hold? If yea goes with Nvidia the 6800 can mine ravencoin and a few others don't get me wrong but you will get the upper hand with the Nvidia, buy the AMD only if you see a very good price.

After the end of ethereum mining, both video cards will probably give a very small profit. Nvidia is better at mining some coins, AMD video cards are better at mining other coins, but probably more than 80% of video cards mine Ethereum.
16 GB memory is probably better than 8 GB in the future.

Since Ethereum get launched this is the second year that you can't mine ETH with 4GB anymore, its been many years so far, imagine if one has a 8GB graphic card lol, now that Ethereum is going PoS it doesn't matter anymore and its going to be tough to see another coin that will make 8GB graphic cards get expired.

What if a new coin appears that requires more than 8 GB of memory? It is beneficial for video card manufacturers to have miners buy new video cards. my old GTX 1070 video card has 8 GB of memory, and then it will be relevant for a long time, and this is unprofitable for Nvidia.

8GB memory out of the box? That's impossible, every new PoW coins needs loads of miners for difficulty to high right? The requirement is literally zero memory and slowly it climbs up with time, I think this is how every coins works.