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That's where you're wrong. I don't just mean pure performance though the 470 would trash a Titan in a lot of newer games, especially dx12. The 470 is much more power efficient, has better support and basically newer is just better.
Same one I've got. Great card but you do have to tweak it a little to get the most of it. A lot of the reviews I suspect don't bother and have them at stock, but there is performance to be had from it if you do.