TFLOPS is a relative term only to the brand of GPUs it's in.

A simple metric is

FLOPS = shaders * 2 * clock frequency

but that's more so the way AMD has their cards laid out.

Generally speaking if you want to directly compare AMD and NVIDIA cards in FLOPS (AMD is usually rated higher than NVIDIA). Then boost the NVIDIA GPUs FLOPS by 30% and then you're in the ballpark for AMD. I don't think anyone has come up with a better solution yet on direct comparisons, but from my experience it the 30% range puts you in ballpark range, so consider the 1070 around 8.5 TFLOP in AMD terms.

That being said the RX 490 Pro seems like it's a dual GPU based on the words of the article, and more than likely it's Xfire RX 480's which is exactly where the 11 TFLOPS would come from, and should be priced at $400 - $500 ($400 would be ideal, but likely $500 for custom cooling etc...).

And it'll be a solid GPU that outperforms the 1070 and go almost toe to toe with the 1080 in most games for a fraction of the price.

http://www.youtube.com/watc...

The RX 490 I'm assuming is going to go toe to toe with the 1070.