Come on, just read the previous post. 295x2 is faster for both xmr and eth. But even if you don't care about the power usage, this is still an old card, they haven't been produced for quite a while now so you're likely buying it used. You also didn't say anything about prices. If it's 1080 ti for $800 vs amd 295x2 for $10000, then no, go with nvidia. The amd card has been out of stock for a long time now, so we've no idea what you are to pay for it.